MESON Chess Problem Database

Problem Display
PID: 25706 (3K4/3R4/p3N3/p3kP2/1R1N3Q/1pp2p2/2q4b/6n1 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

64 Shakhmatnoe obozrenie, 1974

3K4/3R4/p3N3/p3kP2/1R1N3Q/1pp2p2/2q4b/6n1

#2

7 + 9

2988 Izbrannie Kompozitsi 1985
3713 Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qh8#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf7#
      • 1...Kf6
        • 2.Sgxf3#
      • 1...Bf4
        • 2.Qh8#
      • 1...Qxf5!
    • 1.Sc7?
      • threat
        • 2.Rd5#
      • 1...Bf4
        • 2.Qe7#
      • 1...Qe4!
    • 1.Sf8?
      • threat
        • 2.Sg6#
      • 1...Qxf5
        • 2.Sc6#
      • 1...Bf4
        • 2.Qe7#
      • 1...Qg2!
    • 1.Rc4?
      • threat
        • 2.Rc5#
      • 1...Qe4
        • 2.Qh8#
      • 1...Bf4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sg6#
      • 1...Ke4
        • 2.Re7#
      • 1...Qxf5
        • 2.Sc6#
      • 1...Bxf4
        • 2.Qe7#
      • 1...Qg2
        • 2.Sd3#

This anticipates 55393(2001)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::QAB(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(h);S_FLIGHT::QAB(C)+S(E),XP(f)
        • B(c);SBLOCK::QAB(C)
      • Refutation
        • Q(b);XP(D)
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • B(c);SBLOCK::QAR2(C)
      • Refutation
        • Q(b);
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • Q(b);SBLOCK,XP(D)::S(B)
        • B(c);SBLOCK::QAR2(C)
      • Refutation
        • Q(b);
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • Q(b);SBLOCK::QAB(C)
      • Refutation
        • B(c);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(h);P-FLIGHT::R(F)
      • Q(b);SBLOCK,XP(D)::S(B)
      • B(c);SBLOCK,XS(E)::QAR2(C)
      • Q(b);N_GUARD::S(E)
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