MESON Chess Problem Database

Problem Display
PID: 18605 (8/8/8/1p1Q4/1p6/2p5/p1k5/R3K3 w Q - 0 1)

Whyatt, William Albert

Chess World (The), 1957

8/8/8/1p1Q4/1p6/2p5/p1k5/R3K3

#2

3 + 5

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qxa2#
  • Tries
    • 1.Kf1?
      • 1...Kb2
        • 2.Qxa2#
      • 1...b3!
    • 1.Ke2?
      • threat
        • 2.Qxa2#
      • 1...Kb2
        • 2.Qxa2#
      • 1...b3!
    • 1.Kf2?
      • 1...Kb2
        • 2.Qxa2#
      • 1...b3!
    • 1.Rxa2+?
      • 1...Kc1
        • 2.Qd1#
      • 1...Kb1!
    • 1.Qg2+?
      • 1...Kb3
        • 2.Qxa2#
      • 1...Kd3!
    • 1.Qc4?
      • 1...Kb2
        • 2.Qxa2#
      • 1...b3
        • 2.Qe2#
      • 1...bxc4!
    • 1.Qd2+?
      • 1...Kb3
        • 2.Qxa2#
      • 1...cxd2+!
  • Keys
    • 1.Qe6!
      • 1...Kb2
        • 2.Qxa2#
      • 1...Kd3
        • 2.0-0-0#
      • 1...b3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C),XP(a)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
      • Refutation
        • P(d);
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
      • Refutation
        • P(d);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
      • Refutation
        • P(d);
    • Try
      • R(A);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(C),XP(a)
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • P(e);N_SPINP(c),XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(C),XP(a)
      • Refutation
        • P(c);CHECK,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(C),XP(a)
      • K(b);S_FLIGHT::0-0-0
      • P(d);SBLOCK::QAR2(C)
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