MESON Chess Problem Database

Problem Display
PID: 122765 (5B2/2N5/1q1P2K1/P1k5/1NPR4/4P3/1P4R1/5Q1B w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

Source?, 0000

5B2/2N5/1q1P2K1/P1k5/1NPR4/4P3/1P4R1/5Q1B

#2

13 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.d7#
    • 1...Qxc7
      • 2.dxc7#
    • 1...Qxb4
      • 2.Rg5#
    • 1...Qb5
      • 2.d7#
    • 1...Qa6
      • 2.Scxa6#
    • 1...Qc6
      • 2.Sd3#
    • 1...Qxd6+
      • 2.Bxd6#
    • 1...Qb7
      • 2.d7#
    • 1...Qb8
      • 2.Sca6#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Se6#
        • 2.Rg5#
      • 1...Qxd6+
        • 2.Se6#
        • 2.Bxd6#
      • 1...Qxc7
        • 2.Rg5#
        • 2.dxc7#
      • 1...Qxb4
        • 2.Rg5#
      • 1...Qc6
        • 2.Sd3#
        • 2.Se6#
      • 1...Qb7
        • 2.Se6#
        • 2.d7#
      • 1...Qxa5!
    • 1.Qf6?
      • 1...Qxa5
        • 2.d7#
      • 1...Qxc7
        • 2.dxc7#
      • 1...Qxb4
        • 2.Rg5#
        • 2.d7#
      • 1...Qxd6
        • 2.Sca6#
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Qa7
        • 2.d7#
      • 1...Qb5
        • 2.d7#
      • 1...Qa6
        • 2.Scxa6#
      • 1...Qc6
        • 2.Sd3#
      • 1...Qb7
        • 2.d7#
      • 1...Qb8
        • 2.Sca6#
      • 1...Kxb4!
  • Keys
    • 1.Qa1!
      • 1...Qxd6+
        • 2.Bxd6#
      • 1...Kxb4
        • 2.Qa3#
      • 1...Qxa5
        • 2.Qxa5#
      • 1...Qxc7
        • 2.dxc7#
      • 1...Qxb4
        • 2.Rg5#
      • 1...Qa7
        • 2.d7#
      • 1...Qb5
        • 2.d7#
      • 1...Qa6
        • 2.Scxa6#
      • 1...Qc6
        • 2.Sd3#
      • 1...Qb7
        • 2.d7#
      • 1...Qb8
        • 2.Sca6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINP(J)::B(M)+P(J)
    • Q(b);N_PINP(J),XS(L)::B(M)+P(J),XQ(b)
    • Q(b);N_PINP(J),SBLOCK,XS(F)::R(D)
    • Q(b);N_GUARD::S(L),XQ(b)
    • Q(b);SBLOCK::S(F)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(J)::B(M),XQ(b)
    • Q(b);N_GUARD,N_PINP(J)::S(L)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_PINP(J),XS(F)::R(D)
      • Refutation
        • Q(b);N_PINP(J),XP(I)
    • Try
      • Q(A);N_SPINP(J)
      • Vars
        • Q(b);N_GUARD,XP(I)::B(M)+P(J)
        • Q(b);OGATE,XS(L)::B(M)+P(J),XQ(b)
        • Q(b);N_GUARD::B(M)+P(J)
        • Q(b);N_GUARD::S(L),XQ(b)
        • Q(b);SBLOCK::S(F)
        • Q(b);N_GUARD::S(L)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • Q(A);
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(J)::B(M),XQ(b)
      • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
      • Q(b);N_PINP(J),OGATE,XP(I)::QAR2(A),XQ(b)
      • Q(b);N_PINP(J),XS(L)::B(M)+P(J),XQ(b)
      • Q(b);N_PINP(J),SBLOCK,XS(F)::R(D)
      • Q(b);N_PINP(J)::B(M)+P(J)
      • Q(b);N_GUARD::S(L),XQ(b)
      • Q(b);SBLOCK::S(F)
      • Q(b);N_GUARD,N_PINP(J)::S(L)
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