MESON Chess Problem Database

Problem Display
PID: 58822 (7Q/N2p4/4B3/4P1B1/3kpN2/2R2p2/1K2b3/4Rq2 w - - 0 1)

Anonymous

Source?, 0000

7Q/N2p4/4B3/4P1B1/3kpN2/2R2p2/1K2b3/4Rq2

#2

9 + 6

1099 WCSC 1980
5396 World Chess Solving Championship 1977-1996 1997

SOLUTION

  • SOUND
  • Sets
    • 1...dxe6
      • 2.Sc6#
    • 1...d5
      • 2.Sc6#
      • 2.exd5 ep#
    • 1...d6
      • 2.Sc6#
      • 2.exd6#
  • Tries
    • 1.Sxe2+?
      • 1...fxe2
        • 2.Sb5#
        • 2.Be3#
      • 1...Qxe2+!
    • 1.Qa8?
      • threat
        • 2.Qd5#
      • 1...Kxe5
        • 2.Qd5#
      • 1...dxe6
        • 2.Sc6#
      • 1...d5
        • 2.Sc6#
        • 2.Qxd5#
      • 1...Bc4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb5#
      • 1...Bxd3
        • 2.Be3#
      • 1...exd3
        • 2.Rc4#
      • 1...dxe6
        • 2.Qd8#
      • 1...e3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD,XB(G)::S(H)
  • Tries
    • Try
      • S(D);CHECK,XB(b)
      • Refutation
        • Q(a);CHECK,XS(D)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(d);S_FLIGHT,XP(E)::QAR1(I)
        • P(f);N_GUARD,XB(G)::S(H)
      • Refutation
        • B(b);
  • Actual
    • S(D);
    • Threat
      • S(H)
    • Vars
      • B(b);XS(D)::B(F)
      • P(e);SBLOCK,XS(D)::R1(C)
      • P(f);OGATEB,XB(G)::QAR(I)
      • P(e);OGATEB::QAR(I)
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