MESON Chess Problem Database

Problem Display
PID: 102965 (b2B4/2n1p2p/2k1P1pP/2N1P1K1/P2P4/1Q6/8/8 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1927

b2B4/2n1p2p/2k1P1pP/2N1P1K1/P2P4/1Q6/8/8

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb7
      • 2.Qxb7#
    • 1...Sb5
      • 2.Qf3#
      • 2.axb5#
    • 1...Sd5
      • 2.Qb5#
    • 1...Sa6
      • 2.Qf3#
    • 1...Sxe6+
      • 2.Qxe6#
    • 1...Se8
      • 2.Qf3#
  • Tries
    • 1.Kg4?
      • 1...Sxe6
        • 2.Qxe6#
        • 2.Qf3#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sb5
        • 2.Qf3#
        • 2.axb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sa6
        • 2.Qf3#
      • 1...Se8
        • 2.Qf3#
      • 1...g5!
    • 1.Kh4?
      • 1...Sxe6
        • 2.Qxe6#
        • 2.Qf3#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sb5
        • 2.Qf3#
        • 2.axb5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sa6
        • 2.Qf3#
      • 1...Se8
        • 2.Qf3#
      • 1...g5+!
    • 1.Sa6?
      • threat
        • 2.Sb8#
      • 1...Sxa6
        • 2.Qf3#
        • 2.Qb5#
      • 1...Sb5
        • 2.Qf3#
        • 2.Qxb5#
      • 1...Sxe6+!
    • 1.Sd7?
      • threat
        • 2.Sb8#
      • 1...Sb5
        • 2.Qf3#
        • 2.Qxb5#
      • 1...Sa6
        • 2.Qf3#
        • 2.Qb5#
        • 2.d5#
      • 1...Sxe6+!
    • 1.Bxc7?
      • 1...Bb7
        • 2.Qxb7#
      • 1...Kxc7!
    • 1.d5+?
      • 1...Sxd5
        • 2.Qb5#
      • 1...Kxc5!
  • Keys
    • 1.Qc4!
      • 1...Sxe6+
        • 2.Qxe6#
      • 1...Kb6
        • 2.Qa6#
      • 1...Bb7
        • 2.Sd7#
      • 1...Sb5
        • 2.axb5#
        • 2.d5#
      • 1...Sd5
        • 2.Qb5#
      • 1...Sa6
        • 2.d5#
      • 1...Se8
        • 2.d5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::QAB1(A),XB(f)
    • S(c);N_GUARD,SBLOCK::QAB1(A)
    • S(c);N_GUARD::QAB(A)
    • S(c);CHECK,OGATE,XP(G)::QAR2(A),XS(c)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • B(f);N_GUARD::QAB1(A),XB(f)
        • S(c);N_GUARD,SBLOCK::QAB1(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • P(b);
    • Try
      • K(F);S_FLIGHT
      • Vars
        • B(f);N_GUARD::QAB1(A),XB(f)
        • S(c);N_GUARD,SBLOCK::QAB1(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • P(b);CHECK
    • Try
      • S(D);
      • Threat
        • S(D)
      • Refutation
        • S(c);CHECK,XP(G)
    • Try
      • S(D);
      • Threat
        • S(D)
      • Refutation
        • S(c);CHECK,XP(G)
    • Try
      • B(I);XS(c)
      • Vars
        • B(f);N_GUARD::QAB1(A),XB(f)
      • Refutation
        • K(a);P-FLIGHT,XB(I)
    • Try
      • P(C);CHECK
      • Vars
        • S(c);SBLOCK,XP(C)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • Q(A);
    • Vars
      • S(c);CHECK,OGATE,XP(G)::QAR2(A),XS(c)
      • K(a);P-FLIGHT,P_SPINS(c)::QAR1(A)
      • B(f);SBLOCK::QAR(A)+S(D)
      • S(c);N_GUARD,SBLOCK::QAB1(A)
      • S(c);N_GUARD::P(C)
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