MESON Chess Problem Database

Problem Display
PID: 17237 (3NN2b/1Q2n2r/5P2/5kpP/2P1R3/4P3/n4K2/1b6 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1925

3NN2b/1Q2n2r/5P2/5kpP/2P1R3/4P3/n4K2/1b6

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6
      • 2.Sd6#
    • 1...Sd5
      • 2.Qxd5#
      • 2.Qxh7#
    • 1...Sc6
      • 2.Qxh7#
    • 1...Sc8
      • 2.Qd5#
      • 2.Qxh7#
    • 1...Sg8
      • 2.Qd5#
      • 2.Qxh7#
  • Tries
    • 1.Rf4+?
      • 1...Ke5
        • 2.Qc7#
        • 2.Qb8#
      • 1...gxf4!
    • 1.Qb5+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kxe4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sd4#
      • 1...Kxe4
        • 2.Qxb1#
      • 1...Rxh5
        • 2.Sxe7#
      • 1...Bxe4
        • 2.Qd7#
      • 1...Bxf6
        • 2.Sd6#
      • 1...Sxc6
        • 2.Qxh7#
      • 1...g4
        • 2.Re5#
      • 1...Sd5
        • 2.Qxh7#

This is a version of 141355

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK,XP(F)::S(I)
    • S(e);OGATE::QAB(G),XR(f)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • P(d);XR(D)
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(G),XS(e)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB(G),XB(a)
      • R(f);N_GUARD,XP(E)::S(H),XS(e)
      • B(a);SBLOCK,XR(D)::QAB(G)
      • B(g);SBLOCK,XP(F)::S(I)
      • S(e);OGATE,XS(H)::QAB(G),XR(f)
      • P(d);SBLOCK::R1(D)
      • S(e);OGATE::QAB(G),XR(f)
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