MESON Chess Problem Database

Problem Display
PID: 84955 (2b2K1b/1pB3n1/1P2k1p1/3NP1p1/6R1/4P2B/P3Q3/8 w - - 0 1)

Petite, Efren

The Problemist, 1992

2b2K1b/1pB3n1/1P2k1p1/3NP1p1/6R1/4P2B/P3Q3/8

#2

10 + 7

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qc4#
    • 1...Kf5
      • 2.Rf4#
  • Tries
    • 1.Sf4+?
      • 1...Kf5
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Kd7
        • 2.Qb5#
      • 1...gxf4!
    • 1.Sf6?
      • 1...Kf5
        • 2.Rf4#
      • 1...Sf5
        • 2.Qc4#
      • 1...Sh5
        • 2.Rxg5#
      • 1...Se8
        • 2.Rxg5#
      • 1...Bd7!
    • 1.Se7?
      • 1...Kd7
        • 2.Rd4#
      • 1...Bd7
        • 2.Qc4#
      • 1...Sh5
        • 2.Rxg5#
      • 1...Se8
        • 2.Rxg5#
      • 1...Sf5!
  • Keys
    • 1.Qc4!
      • 1...Kf5
        • 2.Se7#
        • 2.Rf4#
      • 1...Kd7
        • 2.Sf6#
      • 1...Sf5
        • 2.Sf6#
      • 1...Bd7
        • 2.Se7#
      • 1...Sh5
        • 2.Rxg5#
      • 1...Se8
        • 2.Rxg5#

This anticipates 180836(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(B)
    • K(b);S_FLIGHT::B(D)+R(E),DCHECK
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(B)
      • Refutation
        • P(a);XS(F)
    • Try
      • S(F);
      • Vars
        • K(b);S_FLIGHT::B(D)+R(E),DCHECK
        • S(e);SBLOCK::QAB(B)
        • S(e);N_GUARD::B(D)+R(E),XP(a)
      • Refutation
        • B(f);
    • Try
      • S(F);
      • Vars
        • K(b);S_FLIGHT::B(D)+R(E),DCHECK
        • B(f);SBLOCK::QAB(B)
        • S(e);N_GUARD::B(D)+R(E),XP(a)
      • Refutation
        • S(e);
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • S(e);SBLOCK::QAB(B)+S(F)
      • B(f);SBLOCK::QAB(B)+S(F)
      • S(e);N_GUARD::B(D)+R(E),XP(a)
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