MESON Chess Problem Database

Problem Display
PID: 141355 (3N2b1/Q2n2r1/4P3/3NkpP1/1P1R4/3ppP2/6n1/b5K1 w - - 0 1)

Kofman, Rafael Moiseevich

1st Prize, Revista de Sah, 1925

3N2b1/Q2n2r1/4P3/3NkpP1/1P1R4/3ppP2/6n1/b5K1

#2

9 + 9

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc7#
  • Tries
    • 1.Sxe3?
      • threat
        • 2.Sc4#
      • 1...Bxd4
        • 2.Qc7#
      • 1...Bxe6
        • 2.Sc6#
      • 1...Sxe3
        • 2.f4#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qxg7#
      • 1...Sb6
        • 2.Qxg7#
      • 1...f4
        • 2.Rd5#
      • 1...Rxg5!
    • 1.f4+?
      • 1...Kd6
        • 2.Qc7#
      • 1...Sxf4!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sc4#
      • 1...Kxd4
        • 2.Qxa1#
      • 1...Rxg5
        • 2.Sxd7#
      • 1...Bxd4
        • 2.Qc7#
      • 1...Bxe6
        • 2.Sc6#
      • 1...Sxb6
        • 2.Qxg7#
      • 1...f4
        • 2.Rd5#
      • 1...Sc5
        • 2.Qxg7#

There are these versions: 17237

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAB1(H)
  • Tries
    • Try
      • S(E);XP(d)
      • Threat
        • S(E)
      • Vars
        • B(a);P_PINS(E),SBLOCK,XR(D)::QAB(H)
        • B(i);SBLOCK,XP(G)::S(I)
        • S(b);N_GUARD,P_PINP(F),XS(E)::P(B)
        • S(g);OGATE::QAB(H),XR(h)
        • P(f);SBLOCK::R1(D)
      • Refutation
        • R(h);XP(F)
    • Try
      • P(B);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(H)
      • Refutation
        • S(b);P_PINP(F),XP(B)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(D)::QAB(H),XB(a)
      • R(h);N_GUARD,XP(F)::S(E),XS(g)
      • B(a);SBLOCK,XR(D)::QAB(H)
      • B(i);SBLOCK,XP(G)::S(I)
      • S(g);OGATE,XS(E)::QAB(H),XR(h)
      • P(f);SBLOCK::R1(D)
      • S(g);OGATE::QAB(H),XR(h)
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