MESON Chess Problem Database

Problem Display
PID: 61915 (1Qb3R1/1p2p1n1/4k1K1/1pPnNpP1/4N1P1/1B4r1/4R2B/q2r4 w - - 0 1)

Markovsky, Grigory F

3rd Prize, Shakhmaty, 1985

1Qb3R1/1p2p1n1/4k1K1/1pPnNpP1/4N1P1/1B4r1/4R2B/q2r4

#2

11 + 11

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qxc8#
    • 1...Rg1
      • 2.Qxc8#
    • 1...Rg2
      • 2.Qxc8#
    • 1...Rxb3
      • 2.Qxc8#
    • 1...Rc3
      • 2.Qxc8#
    • 1...Rd3
      • 2.Qxc8#
    • 1...Re3
      • 2.Qxc8#
    • 1...Rf3
      • 2.Qxc8#
    • 1...Rh3
      • 2.Qxc8#
    • 1...Rxg4
      • 2.Qxc8#
    • 1...Sh5
      • 2.gxf5#
    • 1...Se8
      • 2.gxf5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qxc8#
      • 1...Bd7
        • 2.Sf3#
      • 1...Qa8!
    • 1.Sf6?
      • threat
        • 2.Qxc8#
      • 1...exf6
        • 2.Qd6#
      • 1...Qa8
        • 2.Sf3#
      • 1...Bd7!
    • 1.Re8?
      • threat
        • 2.Qd6#
      • 1...Qxe5
        • 2.Qxc8#
      • 1...Sxe8
        • 2.gxf5#
      • 1...Qa6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qxc8#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Kd7
        • 2.Qxc8#
      • 1...Qa8
        • 2.Sf6#
      • 1...Bd7
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(a);SBLOCK,XS(G)::QAB(J),XB(k)
    • R(c);::QAB(J),XB(k)
    • R(c);N_SPINS(e),XB(C)::QAB(J),XB(k)
    • R(c);P_PINP(H),XP(E)::QAB(J),XB(k)
    • S(j);N_GUARD::P(E),XP(f)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB(J),XB(k)
      • Vars
        • B(k);SBLOCK::R(A)+S(G)
      • Refutation
        • Q(a);
    • Try
      • S(D);
      • Threat
        • QAB(J),XB(k)
      • Vars
        • P(i);N_GUARD,XS(D)::QAR1(J)
        • Q(a);N_GUARD::R(A)+S(G)
      • Refutation
        • B(k);
    • Try
      • R(K);P_PINP(i)
      • Threat
        • QAR1(J)
      • Vars
        • Q(a);SBLOCK,XS(G)::QAB(J),XB(k)
        • S(j);N_GUARD,N_SPINP(i),XR(K)::P(E),XP(f)
      • Refutation
        • Q(a);
  • Actual
    • S(G);
    • Threat
      • QAB(J),XB(k)
    • Vars
      • Q(a);CHECK,N_GUARD::R(A)+S(D),XQ(a)
      • K(g);N_SPINS(e),S_FLIGHT::QAB1(J),XB(k)
      • Q(a);N_GUARD::R(A)+S(D)
      • B(k);SBLOCK::R(A)+S(D)
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