MESON Chess Problem Database

Problem Display
PID: 87857 (2R5/p2N3K/kqB1N1Q1/p7/bp6/8/8/8 w - - 0 1)

Trzesowski, Andrzej

Problemista, 1965

2R5/p2N3K/kqB1N1Q1/p7/bp6/8/8/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sc7#
    • 1...Qf2
      • 2.Sc7#
    • 1...Qe3
      • 2.Sc7#
    • 1...Qd4
      • 2.Sc7#
    • 1...Qc5
      • 2.Sexc5#
      • 2.Sc7#
    • 1...Qc7
      • 2.Sc5#
      • 2.Sxc7#
    • 1...Qd8
      • 2.Sec5#
    • 1...Qb5
      • 2.Sc7#
    • 1...Qb7
      • 2.Sc5#
    • 1...Qb8
      • 2.Sec5#
  • Tries
    • 1.Bb7+?
      • 1...Kb5
        • 2.Qd3#
      • 1...Qxb7
        • 2.Sc7#
      • 1...Kxb7!
    • 1.Qd3+?
      • 1...Qb5
        • 2.Sec5#
        • 2.Sc7#
      • 1...Bb5!
  • Keys
    • 1.Bb5+!
      • 1...Kxb5
        • 2.Qd3#
      • 1...Kb7
        • 2.Rb8#
      • 1...Qxb5
        • 2.Sec5#
      • 1...Bxb5
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::S(B)
    • Q(e);N_GUARD,P_PINS(D)::S(B)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(C)
        • Q(e);P_PINS(D),SBLOCK,XB(A)::QAR(C)+S(B),DCHECK
      • Refutation
        • K(d);S_FLIGHT,XB(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(A);CHECK
    • Vars
      • K(d);S_FLIGHT,XB(A)::QAB(C)
      • K(d);S_FLIGHT::R1(F)
      • Q(e);SBLOCK,XB(A)::QAR(C)+S(B),DCHECK
      • B(a);SBLOCK,XB(A)::S(B)
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