MESON Chess Problem Database

Problem Display
PID: 193855 (R2N4/2pR4/1N1P4/2kp4/2P2P2/b7/1p1Q4/1K6 w - - 0 1)

Wainwright, Joseph CJ

Pittsburgh Gazette-Times, 1916

R2N4/2pR4/1N1P4/2kp4/2P2P2/b7/1p1Q4/1K6

#2

9 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb6
      • 2.Qa5#
    • 1...d4
      • 2.Qa5#
    • 1...cxb6
      • 2.Rc8#
  • Tries
    • 1.Rxc7+?
      • 1...Kxb6
        • 2.Rc6#
        • 2.Qa5#
      • 1...Kxd6!
    • 1.Qc3?
      • threat
        • 2.Sa4#
      • 1...Kxb6
        • 2.Qa5#
      • 1...cxb6
        • 2.Rc8#
      • 1...dxc4!
    • 1.Qe3+?
      • 1...Kb4
        • 2.Sc6#
        • 2.Ra4#
        • 2.Qxa3#
      • 1...d4!
    • 1.Qxd5+?
      • 1...Kxb6
        • 2.Qc6#
        • 2.Qa5#
        • 2.Qb5#
      • 1...Kb4!
    • 1.dxc7?
      • 1...Kxb6
        • 2.Qa5#
      • 1...dxc4
        • 2.Qa5#
      • 1...d4
        • 2.Qa5#
      • 1...Bb4!
  • Keys
    • 1.Rb8!
      • 1...dxc4
        • 2.Sa4#
      • 1...cxb6
        • 2.Rc8#
      • 1...cxd6
        • 2.Rc7#
      • 1...Bb4
        • 2.Qxd5#
      • 1...d4
        • 2.Qa5#
      • 1...c6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT,XS(E)::QAB1(B)
    • P(d);SBLOCK::QAR2(B)
    • P(e);OGATEB,SBLOCK,XS(E)::R(H)
  • Tries
    • Try
      • R(G);CHECK,XP(e)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT,XP(F)
    • Try
      • Q(B);
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAB1(B)
        • P(e);OGATEB,SBLOCK,XS(E)::R(H)
      • Refutation
        • P(d);P_SPINP(d),XP(C)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(B);CHECK,XP(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(F);XP(e)
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAB1(B)
        • P(d);XP(C)::QAR2(B)
        • P(d);::QAR2(B)
      • Refutation
        • B(b);
  • Actual
    • R(H);
    • Vars
      • P(d);SBLOCK,XP(C)::S(E)
      • P(e);OGATEB,SBLOCK,XS(E)::R(H)
      • P(e);SBLOCK,XP(F)::R(G)
      • B(b);SBLOCK::QAR1(B),XP(d)
      • P(d);SBLOCK::QAR2(B)
      • P(e);SBLOCK::S(I)
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