MESON Chess Problem Database

Problem Display
PID: 96486 (1K3Rn1/3Qn1k1/6Nb/6N1/8/8/7R/8 w - - 0 1)

Kettner, Karl Werner

Il Problema, 1932

1K3Rn1/3Qn1k1/6Nb/6N1/8/8/7R/8

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4?
      • 1...Kxf8
        • 2.Sfe6#
      • 1...Kh8
        • 2.Qd4#
      • 1...Sf6
        • 2.Qxe7#
      • 1...Bxg5!
    • 1.Se5?
      • 1...Kxf8
        • 2.Se6#
      • 1...Bxg5
        • 2.Rf7#
      • 1...Sf6
        • 2.Qxe7#
      • 1...Kh8!
    • 1.Qe6?
      • threat
        • 2.Rf7#
        • 2.Qf7#
      • 1...Sxg6
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Sf6
        • 2.Qf7#
        • 2.Qxf6#
      • 1...Sc6+!
    • 1.Qd4+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Kxg6!
  • Keys
    • 1.Sh8!
      • 1...Kxf8
        • 2.Se6#
      • 1...Kxh8
        • 2.Qd4#
      • 1...Bxg5
        • 2.Rf7#
      • 1...Sf6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT,XR(F)::S(C)
        • K(c);N_SPINS(b),P_SPINB(a),P_SPINS(d),S_FLIGHT::QAB(D)
        • S(d);N_GUARD::QAR2(D),XS(b)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(C);
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT,XR(F)::S(B)
        • B(a);XS(B)::R1(F)
        • S(d);N_GUARD::QAR2(D),XS(b)
      • Refutation
        • K(c);N_SPINS(b),P_SPINB(a),P_SPINS(d),S_FLIGHT
    • Try
      • Q(D);N_PINS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(D);CHECK,N_PINS(b)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(D),XS(d)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT,XR(F)::S(B)
      • K(c);N_SPINS(b),P_SPINB(a),P_SPINS(d),S_FLIGHT,XS(C)::QAB(D)
      • B(a);XS(B)::R1(F)
      • S(d);N_GUARD::QAR2(D),XS(b)
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