MESON Chess Problem Database

Problem Display
PID: 195028 (1n6/8/pp6/pk6/1PR5/8/3QK3/1R6 w - - 0 1)

Hawkins, Xenophon

Pittsburgh Gazette-Times, 1918

1n6/8/pp6/pk6/1PR5/8/3QK3/1R6

#2

5 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qd3#
    • 1...axb4
      • 2.Qxb4#
    • 1...a4
      • 2.Qd5#
  • Tries
    • 1.Rc5+?
      • 1...Ka4
        • 2.Qa2#
      • 1...bxc5!
    • 1.Qd7+?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxd7!
  • Keys
    • 1.Qd6!
      • 1...Ka4
        • 2.b5#
      • 1...Kxc4
        • 2.Qd3#
      • 1...axb4
        • 2.Qxb4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qc6#
      • 1...a4
        • 2.Qd5#

This is a version of 193693

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(B)
    • P(a);OGATE,P_SPINP(a),XP(D)::QAR1(B),XP(a)
    • P(a);SBLOCK::QAR2(B)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(B)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
      • Refutation
        • S(e);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATE,S_FLIGHT::R(E)+P(D)
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(B)
      • P(a);OGATE,P_SPINP(a),XP(D)::QAR1(B),XP(a)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(e);N_GUARD::QAB1(B)
      • P(a);SBLOCK::QAR2(B)
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