MESON Chess Problem Database

Problem Display
PID: 228929 (4K3/1R3P2/2k1B2Q/2N1rp2/5B2/1P2P2P/8/2R5 w - - 0 1)

Ellerman, Arnoldo

Comm., Tijdschrift vd NSB, 1926

4K3/1R3P2/2k1B2Q/2N1rp2/5B2/1P2P2P/8/2R5

#2

11 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Bd7#
    • 1...Rxe6+
      • 2.Qxe6#
  • Tries
    • 1.Sa4+?
      • 1...Kd6
        • 2.Rb6#
        • 2.Rd7#
        • 2.f8Q#
        • 2.f8B#
      • 1...Rc5
        • 2.Rb6#
      • 1...Kxb7!
    • 1.Sd7+?
      • 1...Kd6
        • 2.Bxe5#
        • 2.Rb6#
        • 2.f8Q#
        • 2.f8B#
      • 1...Rc5
        • 2.Rb6#
      • 1...Kxb7!
    • 1.Rb6+?
      • 1...Kc7
        • 2.Sa4#
        • 2.Sd7#
      • 1...Kxb6!
    • 1.Rb8?
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Kd6
        • 2.Sb7#
      • 1...Rxe3
        • 2.Sd3#
      • 1...Rxc5
        • 2.Bc4#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rd5
        • 2.Bd7#
      • 1...Kc7!
    • 1.f8Q?
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Rxe3
        • 2.Qd6#
      • 1...Re4
        • 2.Qd6#
      • 1...Rd5
        • 2.Bd7#
      • 1...Rxc5!
  • Keys
    • 1.Rb4!
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Kd6
        • 2.Sb7#
      • 1...Kc7
        • 2.Se4#
      • 1...Rxe3
        • 2.Sd3#
      • 1...Rxc5
        • 2.Bc4#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rd5
        • 2.Bd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINB(G),SBLOCK::QAR(H)+B(G),DCHECK
    • R(a);CHECK,OGATE,P_SPINR(a),XB(G)::QAR2(H),XR(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(a);N_PINB(G),P_SPINR(a)::R1(I)
      • Refutation
        • K(c);S_FLIGHT,XR(I)
    • Try
      • S(F);CHECK
      • Vars
        • R(a);N_PINB(G),P_SPINR(a)::R1(I)
      • Refutation
        • K(c);S_FLIGHT,XR(I)
    • Try
      • R(I);CHECK
      • Refutation
        • K(c);P-FLIGHT,XR(I)
    • Try
      • R(I);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XB(G)::QAR2(H),XR(a)
        • K(c);P-FLIGHT,P_SPINR(a)::S(F)
        • R(a);N_GUARD,XP(C)::R(A)+S(F)
        • R(a);N_PINB(G),P_SPINR(a),SBLOCK,XS(F)::QAR(H)+B(G)
        • R(a);N_GUARD::R(A)+S(F),XR(a)
        • R(a);N_PINB(G),SBLOCK::QAR(H)+B(G),DCHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(a)
    • Try
      • P(J);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XB(G)::QAR2(H),XR(a)
        • R(a);XP(C)::QAR1(J)
        • R(a);::QAR1(J)
        • R(a);N_PINB(G),SBLOCK::QAR(H)+B(G),DCHECK
      • Refutation
        • R(a);N_PINB(G),P_SPINR(a),XS(F)
  • Actual
    • R(I);
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XB(G)::QAR2(H),XR(a)
      • K(c);P-FLIGHT,P_SPINR(a)::S(F)
      • K(c);P-FLIGHT,P_SPINR(a)::R(A)+S(F)
      • R(a);N_GUARD,XP(C)::R(A)+S(F)
      • R(a);N_PINB(G),P_SPINR(a),SBLOCK,XS(F)::QAR(H)+B(G)
      • R(a);N_GUARD::R(A)+S(F),XR(a)
      • R(a);N_PINB(G),SBLOCK::QAR(H)+B(G),DCHECK
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