MESON Chess Problem Database

Problem Display
PID: 189937 (Q1R1Nb1n/1rp1k2P/5R2/3b2BK/N1p1pP2/4p2B/6n1/8 w - - 0 1)

Marble, Murray

Pittsburgh Gazette-Times, 1912

Q1R1Nb1n/1rp1k2P/5R2/3b2BK/N1p1pP2/4p2B/6n1/8

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rxc7#
    • 1...Rb2
      • 2.Rxc7#
    • 1...Rb3
      • 2.Rxc7#
    • 1...Rb4
      • 2.Rxc7#
    • 1...Rb5
      • 2.Rxc7#
    • 1...Rb6
      • 2.Rxc7#
    • 1...Bf7+
      • 2.Rg6#
    • 1...Bg8
      • 2.hxg8S#
    • 1...Sxf4+
      • 2.Rxf4#
    • 1...c6
      • 2.Qxb7#
  • Tries
    • 1.Rf5+?
      • 1...Ke6
        • 2.Rxf8#
      • 1...Kd7!
    • 1.Re6+?
      • 1...Kd7
        • 2.Sf6#
        • 2.Rd6#
        • 2.Rd8#
      • 1...Kf7!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sxd5#
      • 1...Bf7+
        • 2.Rg6#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Rxb6
        • 2.Rxc7#
      • 1...cxb6
        • 2.Qa3#
      • 1...Bc6
        • 2.Qa3#
      • 1...Be6
        • 2.Rf5#
      • 1...Bg8
        • 2.hxg8S#
      • 1...c6
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::R(I),XP(g)
    • B(e);CHECK,SBLOCK::B(D)+R(F)
    • B(e);OGATE::PXB(e)=S
    • S(a);CHECK,OGATE,XP(C)::B(D)+R(F),XS(a)
    • P(g);OGATEB::QAR(H),XR(f)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(h);P-FLIGHT::B(A)+R(F),XB(i)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • R(F);CHECK
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(B),XB(e)
    • Vars
      • B(e);CHECK,SBLOCK::B(D)+R(F)
      • S(a);CHECK,OGATE,XP(C)::B(D)+R(F),XS(a)
      • R(f);N_GUARD,XS(B)::R(I),XP(g)
      • P(g);N_GUARD,XS(B)::QAB(H)
      • B(e);S_CUTP(g)::QAB(H)
      • B(e);SBLOCK::B(D)+R(F)
      • B(e);OGATE::PXB(e)=S
      • P(g);OGATEB::QAR(H),XR(f)
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