MESON Chess Problem Database

Problem Display
PID: 53646 (8/8/p7/pk2K3/1PR5/8/3P4/1R3Q2 w - - 0 1)

Dobbs, Gilbert S

The Chess Review, 1934

8/8/p7/pk2K3/1PR5/8/3P4/1R3Q2

#2

6 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Rc2+?
      • 1...Ka4
        • 2.Ra2#
      • 1...Kb6!
    • 1.Rc5+?
      • 1...Ka4
        • 2.Rxa5#
      • 1...Kb6!
  • Keys
    • 1.Qf8!
      • 1...Ka4
        • 2.b5#
      • 1...Kxc4
        • 2.Qf1#
      • 1...Kb6
        • 2.Qb8#
      • 1...axb4
        • 2.Qxb4#
      • 1...a4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);S_FLIGHT::R(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::R1(E),XP(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATE,S_FLIGHT::R(E)+P(D)
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB(B)
      • K(b);P-FLIGHT::QAR2(B)
      • P(a);OGATE,P_SPINP(a),XP(D)::QAR1(B),XP(a)
      • P(a);SBLOCK::QAR1(B)
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