MESON Chess Problem Database

Problem Display
PID: 18905 (6Q1/1p1NKNp1/1PP3P1/1prk1p2/1Ppr1p2/2Pp1p2/3P1P2/8 w - - 0 1)

Willemsens, Luis Cornelis

Comm., Die Schwalbe, 1959

6Q1/1p1NKNp1/1PP3P1/1prk1p2/1Ppr1p2/2Pp1p2/3P1P2/8

#2

11 + 11

273 Mat Plus 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sg5#
    • 1...Kxc6
      • 2.Sd8#
    • 1...Re4+
      • 2.Sfe5#
    • 1...Rxc6
      • 2.Sd6#
    • 1...bxc6
      • 2.Sg5#
      • 2.Sd6#
  • Tries
    • 1.bxc5?
      • 1...Re4+
        • 2.Sfe5#
      • 1...Ke4
        • 2.Sg5#
      • 1...Kxc6
        • 2.Sfe5#
        • 2.Sd8#
      • 1...bxc6
        • 2.Sg5#
        • 2.Sd6#
      • 1...b4!
    • 1.c7?
      • 1...Re4+
        • 2.Sfe5#
      • 1...Ke4
        • 2.Sg5#
      • 1...Kc6
        • 2.Sd8#
      • 1...Rc6
        • 2.Sd6#
      • 1...Rxc7!
  • Keys
    • 1.Qd8!
      • 1...Re4+
        • 2.Sde5#
      • 1...Ke4
        • 2.Sxc5#
      • 1...Kxc6
        • 2.Sb8#
      • 1...Rxc6
        • 2.Sf6#
      • 1...bxc6
        • 2.Sxc5#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(h);S_FLIGHT::S(J)
    • K(h);S_FLIGHT,XP(F)::S(J)
    • R(d);CHECK,SBLOCK::QAB(K)+S(J)
    • R(g);SBLOCK,XP(F)::QAB(K)+S(J)
  • Tries
    • Try
      • P(D);XR(g)
      • Vars
        • R(d);CHECK,SBLOCK::QAB(K)+S(J)
        • K(h);S_FLIGHT::S(J)
      • Refutation
        • P(f);
    • Try
      • P(F);
      • Vars
        • R(d);CHECK,SBLOCK::QAB(K)+S(J)
        • K(h);S_FLIGHT::S(J)
        • R(g);SBLOCK::QAB(K)+S(J)
      • Refutation
        • R(g);P_PINS(H),XP(F)
  • Actual
    • Q(K);
    • Vars
      • R(d);CHECK,SBLOCK::QAR(K)+S(H)
      • K(h);S_FLIGHT::S(H),XR(g)
      • K(h);S_FLIGHT,XP(F)::S(H)
      • R(g);SBLOCK,XP(F)::QAR(K)+S(H),DCHECK
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