MESON Chess Problem Database

Problem Display
PID: 214897 (k6r/2p5/KnP5/Q7/R2b4/8/7R/7B w - - 0 1)

Peterson, James W

St. Louis Globe Democrat, 1878

k6r/2p5/KnP5/Q7/R2b4/8/7R/7B

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Kb5#
  • Tries
    • 1.Rxh8+?
      • 1...Sc8
        • 2.Rxc8#
      • 1...Bxh8!
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Kb5#
        • 2.Qb7#
      • 1...Bxb6
        • 2.Rxh8#
      • 1...cxb6
        • 2.c7#
      • 1...Rh5
        • 2.Qb7#
      • 1...Rb8
        • 2.Kb5#
      • 1...Bc3
        • 2.Qa7#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAR(D)+K(E)
  • Tries
    • Try
      • R(B);CHECK,XR(e)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R(B),XS(b)
      • Refutation
        • B(a);XR(B)
  • Actual
    • Q(D);XS(b)
    • Threat
      • DUALS(2)
    • Vars
      • B(a);N_GUARD,XQ(D)::R(B),XR(e)
      • P(c);OGATE,XQ(D)::B(A)+P(F)
      • R(e);::QAB1(D)
      • R(e);::R(C)+K(E)
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