MESON Chess Problem Database

Problem Display
PID: 137488 (BBK2bQ1/6pn/2P1P3/2pk1b2/1pp1R3/3Pp1P1/1Nn5/3R4 w - - 0 1)

Ellerman, Arnoldo

Land og Folk, 1967

BBK2bQ1/6pn/2P1P3/2pk1b2/1pp1R3/3Pp1P1/1Nn5/3R4

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.dxc4#
    • 1...Bxe6+
      • 2.Qxe6#
    • 1...Bd6
      • 2.c7#
    • 1...Sd4
      • 2.Re5#
  • Tries
    • 1.Kd7?
      • threat
        • 2.c7#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Bxe4
        • 2.dxc4#
      • 1...Sd4
        • 2.Re5#
      • 1...Sf6+!
    • 1.Sxc4?
      • threat
        • 2.Sb6#
        • 2.c7#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Sd4
        • 2.Sxe3#
        • 2.Sb6#
        • 2.Re5#
      • 1...Bxe4!
    • 1.Bf4?
      • threat
        • 2.c7#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Bxe4
        • 2.dxc4#
      • 1...Sd4!
  • Keys
    • 1.d4!
      • threat
        • 2.Re5#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Kxe4
        • 2.c7#
      • 1...Bxe4
        • 2.e7#
      • 1...Bd6
        • 2.c7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(g);N_PINP(G),SBLOCK,XR(E)::R(A)+P(C)DCHECK,XP(d)
    • B(g);CHECK,OGATE,P_SPINB(g),XP(G)::QAB1(K),XB(g)
    • B(j);SBLOCK::B(H)+P(F)
    • S(a);SBLOCK::R1(E)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • B(H)+P(F)
      • Vars
        • B(g);CHECK,OGATE,P_SPINB(g),XP(G)::QAB1(K),XB(g)
        • B(g);N_PINP(G),SBLOCK,XR(E)::R(A)+P(C)DCHECK,XP(d)
        • S(a);SBLOCK::R1(E)
      • Refutation
        • S(i);CHECK
    • Try
      • S(B);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);CHECK,OGATE,P_SPINB(g),XP(G)::QAB1(K),XB(g)
      • Refutation
        • B(g);N_PINP(G),XR(E)
    • Try
      • B(I);
      • Threat
        • B(H)+P(F)
      • Vars
        • B(g);CHECK,OGATE,P_SPINB(g),XP(G)::QAB1(K),XB(g)
        • B(g);N_PINP(G),SBLOCK,XR(E)::R(A)+P(C)DCHECK,XP(d)
      • Refutation
        • S(a);
  • Actual
    • P(C);
    • Threat
      • R1(E)
    • Vars
      • B(g);CHECK,OGATE,P_SPINB(g),XP(G)::QAB1(K),XB(g)
      • K(f);S_FLIGHT,XR(E)::B(H)+P(F)
      • B(g);N_PINP(G),SBLOCK,XR(E)::QAB(K)+P(G)
      • B(j);SBLOCK::B(H)+P(F)
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