MESON Chess Problem Database

Problem Display
PID: 24379 (1B1R3b/p2N2r1/8/n1Nk1PQ1/B2p4/1PP5/1P2nK2/8 w - - 0 1)

Marandiuk, Mikhail Nazarovich

2nd Prize, Boletim da UBP, 1980

1B1R3b/p2N2r1/8/n1Nk1PQ1/B2p4/1PP5/1P2nK2/8

#2

11 + 7

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.f6#
    • 1...Rf7
      • 2.Qg2#
      • 2.f6#
    • 1...Rh7
      • 2.Qg2#
      • 2.f6#
    • 1...Rg8
      • 2.Qxg8#
    • 1...Sc6
      • 2.c4#
    • 1...Sb7
      • 2.c4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.S7c5#
      • 1...Rxd7
        • 2.Qg2#
      • 1...Sxb3!
    • 1.Sa6?
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Sdc5#
      • 1...Rxd7
        • 2.Qg2#
      • 1...Sxb3!
    • 1.Se6?
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Sdc5#
      • 1...Rxd7
        • 2.Qg2#
      • 1...Sxb3!
    • 1.Sf8+?
      • 1...Rd7
        • 2.f6#
      • 1...Kxc5!
    • 1.Bc6+?
      • 1...Sxc6
        • 2.c4#
      • 1...Kxc6!
    • 1.cxd4?
      • threat
        • 2.Sb6#
        • 2.Sf6#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Rxd7
        • 2.Rxd7#
      • 1...Sxb3
        • 2.Sb6#
      • 1...Sxd4!
  • Keys
    • 1.b4!
      • threat
        • 2.Sb6#
      • 1...Kc4
        • 2.Se5#
      • 1...Rxd7
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,P_SPINR(f),XS(I)::QAR(H)+P(G)
    • R(f);OGATE::QAB(H),XR(f)
    • S(c);N_GUARD::P(D)
  • Tries
    • Try
      • S(F);
      • Threat
        • R(K)+S(I),DCHECK
      • Vars
        • K(d);S_FLIGHT::S(I)
        • R(f);N_GUARD,P_SPINR(f),XS(I)::QAB(H)
      • Refutation
        • S(c);XP(C)
    • Try
      • S(F);
      • Threat
        • R(K)+S(I),DCHECK
      • Vars
        • K(d);S_FLIGHT::S(I)
        • R(f);N_GUARD,P_SPINR(f),XS(I)::QAB(H)
      • Refutation
        • S(c);XP(C)
    • Try
      • S(F);
      • Threat
        • R(K)+S(I),DCHECK
      • Vars
        • K(d);S_FLIGHT::S(I)
        • R(f);N_GUARD,P_SPINR(f),XS(I)::QAB(H)
      • Refutation
        • S(c);XP(C)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);P_SPINR(f)::QAR(H)+P(G)
      • Refutation
        • K(d);P-FLIGHT,XS(F)
    • Try
      • B(E);CHECK
      • Vars
        • S(c);SBLOCK,XB(E)::P(D)
      • Refutation
        • K(d);S_FLIGHT,XB(E)
    • Try
      • P(D);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATEB,P-FLIGHT,XP(D)::QAR2(H)
        • R(f);OGATE,P_SPINR(f),XS(I)::R(K),XR(f)
        • S(c);XP(C)::R(K)+S(I),DCHECK
      • Refutation
        • S(a);XP(D)
  • Actual
    • P(C);
    • Threat
      • R(K)+S(I),DCHECK
    • Vars
      • K(d);S_FLIGHT::S(I)
      • R(f);OGATE,P_SPINR(f),XS(I)::QAB(H)
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