MESON Chess Problem Database

Problem Display
PID: 194292 (2n2R2/nP1pkp1N/1r6/B3P3/3N1K2/7B/4R3/8 w - - 0 1)

Richmond, OH

Pittsburgh Sun, 1917

2n2R2/nP1pkp1N/1r6/B3P3/3N1K2/7B/4R3/8

#2

9 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Bd8#
    • 1...Rb2
      • 2.Bd8#
    • 1...Rb3
      • 2.Bd8#
    • 1...Rb4
      • 2.Bd8#
    • 1...Rb5
      • 2.Bd8#
    • 1...Ra6
      • 2.Bd8#
    • 1...Rc6
      • 2.Bd8#
    • 1...Rd6
      • 2.Bd8#
    • 1...Re6
      • 2.Sf5#
      • 2.Bd8#
    • 1...Rg6
      • 2.Bd8#
    • 1...Rh6
      • 2.Bd8#
    • 1...Rxb7
      • 2.Bd8#
    • 1...Sb5
      • 2.bxc8S#
    • 1...Sc6
      • 2.bxc8S#
  • Tries
    • 1.Sc6+?
      • 1...Rxc6
        • 2.Bd8#
      • 1...Sxc6
        • 2.bxc8S#
      • 1...dxc6!
    • 1.Bb4+?
      • 1...Rd6
        • 2.exd6#
      • 1...Sd6
        • 2.exd6#
      • 1...d6
        • 2.exd6#
      • 1...Rxb4!
    • 1.Bxb6?
      • threat
        • 2.Bd8#
      • 1...Sc6
        • 2.bxc8S#
      • 1...Sxb6!
  • Keys
    • 1.Sb5!
      • 1...Rf6+
        • 2.exf6#
      • 1...Rxb5
        • 2.Bd8#
      • 1...Rxb7
        • 2.Bd8#
      • 1...Sxb5
        • 2.bxc8S#
      • 1...f5
        • 2.exf5 ep#
      • 1...Ra6
        • 2.Bd8#
      • 1...Rc6
        • 2.Bd8#
      • 1...Rd6
        • 2.Bd8#
        • 2.exd6#
      • 1...Re6
        • 2.Bd8#
      • 1...Rg6
        • 2.Bd8#
      • 1...Rh6
        • 2.Bd8#
      • 1...Sc6
        • 2.bxc8S#
      • 1...Sd6
        • 2.exd6#
      • 1...d5
        • 2.exd5 ep#
      • 1...d6
        • 2.exd6#
      • 1...f6
        • 2.exf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(a);OGATE::B(E)
    • R(a);OGATE,P_PINS(C)::B(E)
    • R(a);OGATE,XP(G)::B(E)
    • S(b);N_GUARD::PXS(f)=S
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(a);OGATE,XS(C)::B(E)
        • S(b);N_GUARD,S_CUTP(c),S_CUTR(a),XS(C)::PXS(f)=S
      • Refutation
        • P(c);XS(C)
    • Try
      • B(E);CHECK
      • Vars
        • R(a);OGATE,P_SPINR(a)::R(A)+P(F)DCHECK,XR(a)
        • S(f);OGATE,P_SPINS(f)::R(A)+P(F)DCHECK,XS(f)
        • P(c);OGATE,P_SPINP(c)::R(A)+P(F)DCHECK,XP(c)
      • Refutation
        • R(a);P_PINS(C),XB(E)
    • Try
      • B(E);XR(a)
      • Threat
        • B(E)
      • Vars
        • S(b);N_GUARD::PXS(f)=S
      • Refutation
        • S(f);XB(E)
  • Actual
    • S(C);
    • Vars
      • R(a);CHECK,OGATE::R(A)+P(F)DCHECK,XR(a)
      • R(a);OGATE,XS(C)::B(E)
      • R(a);OGATE,XP(G)::B(E)
      • S(b);N_GUARD,XS(C)::PXS(f)=S
      • P(e);OGATE::R(A)+P(F)DCHECK,XP(e),EP
      • R(a);OGATE::B(E)
      • S(b);N_GUARD::PXS(f)=S
      • S(f);OGATE::R(A)+P(F)DCHECK,XS(f)
      • P(c);OGATE::R(A)+P(F)DCHECK,XP(c),EP
      • P(c);OGATE::R(A)+P(F)DCHECK,XP(c)
      • P(e);OGATE::R(A)+P(F)DCHECK,XP(e)
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