MESON Chess Problem Database

Problem Display
PID: 76678 (8/8/p2K4/2pR4/1pk5/2P5/3P4/3Q4 w - - 0 1)

Butwillo, Brother

The Tablet, 1943

(First published on Sat Apr 3 1943)

8/8/p2K4/2pR4/1pk5/2P5/3P4/3Q4

#2

5 + 4

15239 Valois Notebooks 2016

SOLUTION

  • SOUND
  • Sets
    • 1...bxc3
      • 2.Qa4#
    • 1...b3
      • 2.Qe2#
      • 2.Qf1#
  • Tries
    • 1.Kc6?
      • 1...bxc3
        • 2.Qa4#
      • 1...b3
        • 2.Qe2#
        • 2.Qg4#
        • 2.Qf1#
      • 1...a5!
    • 1.Qc2?
      • threat
        • 2.Rxc5#
      • 1...bxc3
        • 2.Qa4#
      • 1...Kb5!
    • 1.Qb3+?
      • 1...Kb5
        • 2.Qxb4#
      • 1...Kxb3!
    • 1.Qg4+?
      • 1...Kb5
        • 2.Qxb4#
      • 1...Kb3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rxc5#
      • 1...Kb5
        • 2.Qxb4#
      • 1...bxc3
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB,XP(C)::QAR2(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(a);OGATEB,XP(C)::QAR2(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • R1(D),XP(c)
      • Vars
        • P(a);OGATEB,P_SPINP(a),XP(C)::QAR2(A)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(c),S_FLIGHT::QAR1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • R1(D),XP(c)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • P(a);SBLOCK,XP(C)::P(B)
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