MESON Chess Problem Database

Problem Display
PID: 177768 (2N2rn1/bqNP1P2/2k3K1/RrPR2p1/6B1/8/7B/2Q5 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Sahs (Latvia), 1987

2N2rn1/bqNP1P2/2k3K1/RrPR2p1/6B1/8/7B/2Q5

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.cxb6#
    • 1...Rxf7
      • 2.d8S#
    • 1...Re8
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Sf6
      • 2.Se7#
    • 1...Sh6
      • 2.Se7#
    • 1...Se7+
      • 2.Sxe7#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Rxf7
        • 2.d8S#
      • 1...Rb3
        • 2.Rd3#
      • 1...Rb4
        • 2.Rd4#
      • 1...Re8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sf6
        • 2.Se7#
      • 1...g4!
    • 1.Rd3?
      • threat
        • 2.Bf3#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Rxf7
        • 2.d8S#
      • 1...Re8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sf6
        • 2.Se7#
      • 1...Rb4!
    • 1.Rd4?
      • threat
        • 2.Bf3#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Rxf7
        • 2.d8S#
      • 1...Re8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sf6
        • 2.Se7#
      • 1...Rb3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rxg5#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Rxc5
        • 2.Rdxc5#
      • 1...Rxf7
        • 2.d8S#
      • 1...Rb3
        • 2.Rd3#
      • 1...Rb1
        • 2.Rd1#
      • 1...Rb2
        • 2.Rd2#
      • 1...Rb4
        • 2.Rd4#
      • 1...Re8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sf6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE::QAR(A)+P(E),XR(a)
    • R(f);N_GUARD,XP(J)::P=S
    • R(f);OGATE::PXR(f)=Q
    • S(g);N_GUARD::S(K)
    • S(g);CHECK,N_GUARD::S(K),XS(g)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(4)
      • Vars
        • S(g);CHECK,N_GUARD::S(K),XS(g)
        • R(f);N_GUARD,XP(J)::P=S
        • R(a);::B(C)+R(F)
        • R(f);OGATE::PXR(f)=Q
        • S(g);N_GUARD::S(K)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Threat
        • B(C)
      • Vars
        • S(g);CHECK,N_GUARD::S(K),XS(g)
        • R(f);N_GUARD,XP(J)::P=S
        • R(f);OGATE::PXR(f)=Q
        • S(g);N_GUARD::S(K)
      • Refutation
        • R(a);
    • Try
      • R(F);
      • Threat
        • B(C)
      • Vars
        • S(g);CHECK,N_GUARD::S(K),XS(g)
        • R(f);N_GUARD,XP(J)::P=S
        • R(f);OGATE::PXR(f)=Q
        • S(g);N_GUARD::S(K)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(F),XP(b)
    • Vars
      • S(g);CHECK,N_GUARD::S(K),XS(g)
      • R(a);OGATE,XP(E)::QAB(A)+R(F),DCHECK,XR(a)
      • R(f);N_GUARD,XP(J)::P=S
      • R(a);::QAB(A)+R(F)
      • R(f);OGATE::PXR(f)=Q
      • S(g);N_GUARD::S(K)
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