MESON Chess Problem Database

Problem Display
PID: 83667 (B1b5/1r1p2PK/1PPkP3/1R1N4/8/2BQP3/8/8 w - - 0 1)

Ellerman, Arnoldo

Comm., Themes-64, 1958

B1b5/1r1p2PK/1PPkP3/1R1N4/8/2BQP3/8/8

#2

11 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Sb4#
      • 2.Se7#
    • 1...Kxe6
      • 2.Qg6#
  • Tries
    • 1.Sf4+?
      • 1...Kxc6
        • 2.Qd5#
      • 1...Ke7!
    • 1.Sc7+?
      • 1...Kxc6
        • 2.Qd5#
      • 1...Ke7!
    • 1.exd7?
      • threat
        • 2.Qg6#
      • 1...Kxc6
        • 2.Sb4#
        • 2.Se7#
      • 1...Ke6
        • 2.Qg6#
      • 1...Bxd7!
    • 1.e7?
      • threat
        • 2.Qg6#
      • 1...Kxc6
        • 2.Sb4#
      • 1...Ke6
        • 2.Qg6#
      • 1...dxc6!
    • 1.g8S?
      • 1...dxc6+
        • 2.Sc7#
      • 1...dxe6+
        • 2.Sde7#
      • 1...Kxc6
        • 2.Sb4#
        • 2.Sde7#
      • 1...Kxe6
        • 2.Qg6#
      • 1...Ra7
        • 2.Sf4#
        • 2.Sc7#
      • 1...Rc7
        • 2.Sf4#
        • 2.Sxc7#
      • 1...Rb8
        • 2.Sf4#
        • 2.Sc7#
      • 1...Rxb6!
  • Keys
    • 1.Qd4!
      • 1...Kxc6
        • 2.Qc5#
      • 1...Kxe6
        • 2.Qf6#
      • 1...Rxb6
        • 2.Qe5#
      • 1...dxc6
        • 2.Qe5#
      • 1...dxe6
        • 2.Qc5#
      • 1...Ra7
        • 2.Qe5#
      • 1...Rc7
        • 2.Qe5#
      • 1...Rb8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(H)::QAR2(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINR(b),XP(G)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINR(b),XP(G)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(H);XP(c)
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • B(d);XP(H)
    • Try
      • P(H);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT,P_SPINR(b),XP(G)::S(E)
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(c);XP(G)
    • Try
      • P(I);
      • Vars
        • P(c);CHECK,SBLOCK,XP(G)::QAR(B)+S(E)
        • P(c);CHECK,SBLOCK,XP(H)::QAR(B)+S(E)
        • K(a);OGATEB,P-FLIGHT,XP(H)::QAR2(B)
      • Refutation
        • R(b);XP(F)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINR(b),XP(G)::QAR1(B)
      • K(a);OGATEB,P-FLIGHT,XP(H)::QAR1(B)
      • R(b);XP(F)::QAB1(B)
      • P(c);P_PINP(I),SBLOCK,XP(G)::QAB1(B)
      • P(c);P_PINP(I),SBLOCK,XP(H)::QAB1(B)
      • R(b);::QAB1(B)
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