Hi,
Here is a nice game where my Fidelity Excellence (original 3Mhz, EP12) with black pieces demonstrated his strength against Tasc The Final ChessCard (Mame emu, Commodore 64 host). The Derksen/Kuyer's engine is roughly on par with the Spracklen's one, but benefits from the card's faster 65C02 (5Mhz). The Aktiv elo-list acknowledges 67 points more for the ChessCard (1852 to 1785).
My own list, using 15s/move, currently lessens the gap by 10 points: Excellence 1780, Tasc TFCC 1837.
The decision is made as early as moves 17 and 19. TFCC lets his white queen get nearly trapped, and the Excellence plays brilliantly with a much powerful bishop.
It will not conclude the game that efficiently, missing some opportunities and, to my opinion, walking its black queen a bit too much instead of bringing other pieces, to end the game sooner. But nevertheless it secured the win.
Analysis with printed evaluations: Hiarcs 14 WCSC, 5s/move, 1 thread
Additional analysis: with help from LC0 024.1, NN LD2-128x10.T17.6-swa-20000 (little demon), BLAS-end (CPU only), CPUCT 1.7
[Event "Tournoi 281"]
[Site "?"]
[Date "2020.04.04"]
[Round "?"]
[White "The Final Chess Card lv 40/10"]
[Black "Fidelity Excellence lv 3 (15s)"]
[Result "0-1"]
[ECO "A30"]
1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.Nc3 e6 6.d3 Be7 7.Bf4 Nh5 8.Bd2 O-O 9.O-O Nc6 10.Qa4 f5 11.Ne5 Qc7 12.Nxc6 Bxc6 13.Nb5 Qe5 14.Bxc6 dxc6 15.Nc3 Qc7 16.b3 a6 17.Rac1 $2 { white queen badly needed to escape from the trap -2.84\19 } ( 17.Qa3 { -0.77\17 } 17...b5 18.Qc1 Bf6 19.Rb1 Bd4 20.Kg2 Qd6 21.Qc2 b4 22.Na4 f4 23.Qd1 Be5 ) 17...b5 18.Qa3 { maybe better: } ( 18.cxb5 axb5 19.Nxb5 Qd7 20.Qc4 cxb5 21.Qc2 { and white is late in material but in a much more robust position } ) 18...b4 19.Qb2 Bf6 $1 { pins the knight against the queen, in addition to controling the diagonal } 20.d4 Bxd4 { and now pins the f2 pawn against the king - this bishop is getting much powerful! } 21.Rfd1 Nxg3 $5 { -2.07\16 } ( 21...f4 { -5.79\15 } 22.g4 Nf6 23.Be1 Nxg4 ) 22.hxg3 Qxg3+ 23.Kh1 Bxf2 24.Bf4 Qxf4 25.Rd3 Qh4+ 26.Kg2 Bd4 { more efficient: } ( 26...Rf6 27.e3 Rg6+ 28.Kf1 Qh3+ 29.Ke2 Rg2 30.Rf1 Bg3+ 31.Kd1 Rxb2 ) 27.Rxd4 { getting rid of the bishop, but the situation is hopeless. } 27...Qg5+ 28.Rg4 Qxg4+ 29.Kf1 Qf4+ 30.Ke1 Qh4+ 31.Kf1 bxc3 32.Qxc3 Qf4+ 33.Ke1 Rad8 34.a3 Qh4+ 35.Kf1 Qh6 36.Ke1 Rd4 37.e3 Rdd8 38.b4 f4 39.exf4 Qxf4 40.Qd4 Rxd4 41.bxc5 Qe4# 0-1
Grüß,
Eric