MESON Chess Problem Database

Problem Display
PID: 142444 (3Q4/B1Pb2rN/R1R1p1p1/3k1rN1/p2P4/1n4p1/BnPP1bK1/8 w - - 0 1)

Mosiashvili, Givi

The Problemist, 2011

3Q4/B1Pb2rN/R1R1p1p1/3k1rN1/p2P4/1n4p1/BnPP1bK1/8

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf6#
    • 1...Rxg5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rg8
      • 2.Qxd7#
    • 1...Sd1
      • 2.c4#
    • 1...Sd3
      • 2.c4#
  • Tries
    • 1.Bxb3+?
      • 1...Sc4
        • 2.Bxc4#
        • 2.Rd6#
      • 1...axb3!
    • 1.Qf6?
      • threat
        • 2.Rc5#
      • 1...Rxg5
        • 2.Qf3#
      • 1...Rxf6
        • 2.Sxf6#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Bxc6
        • 2.Qxe6#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sd3
        • 2.c4#
      • 1...e5
        • 2.Ra5#
        • 2.Qd6#
      • 1...Sc4!
    • 1.d3?
      • threat
        • 2.Rd6#
      • 1...Sxd3
        • 2.c4#
      • 1...Sc4
        • 2.dxc4#
      • 1...Bxd4!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Ra5#
      • 1...Rxg5
        • 2.Sf6#
      • 1...Bxd4
        • 2.Rc5#
      • 1...Bxc6
        • 2.Qxc6#
      • 1...Sc4
        • 2.Rd6#
      • 1...Sd3
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD::S(K)
    • R(g);N_GUARD,XS(F)::S(K)
    • R(g);N_GUARD::S(K),XR(g)
    • R(k);N_GUARD::QAR2(L),XB(j)
    • S(a);N_GUARD::P(B)
  • Tries
    • Try
      • B(A);CHECK,XS(c)
      • Refutation
        • P(e);XB(A)
    • Try
      • Q(L);N_PINB(j)
      • Threat
        • R1(H)
      • Vars
        • R(g);OGATE,XS(F)::QAB(L)
        • R(g);XQ(L)::S(K),XR(g)
        • B(b);OGATE,XP(E)::QAR1(L),XB(b)
        • B(j);N_GUARD,XR(H)::QAB1(L),XP(h)
        • R(g);N_GUARD::QAR1(L),XR(g)
        • S(a);N_GUARD::P(B)
      • Refutation
        • S(a);N_SPINS(c)
    • Try
      • P(C);
      • Threat
        • R1(H)
      • Vars
        • S(a);N_GUARD,XP(C)::P(B)
        • S(a);N_SPINS(c),OGATE::P(C),XS(a)
      • Refutation
        • B(b);XP(E)
  • Actual
    • Q(L);N_PINB(j)
    • Threat
      • R(G)
    • Vars
      • R(g);N_GUARD,XS(F)::S(K)
      • B(b);SBLOCK,XP(E)::QAB(L)+R(H),DCHECK
      • B(j);OGATE,P_SPINB(j),XR(H)::QAB1(L),XB(j)
      • S(a);N_SPINS(c),SBLOCK::QAB(L)+R(H),DCHECK
      • S(a);N_GUARD::P(B)
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