MESON Chess Problem Database

Problem Display
PID: 76822 (6rk/4Q1p1/6K1/6p1/8/6p1/8/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1946

(First published on Sat Sep 7 1946)

6rk/4Q1p1/6K1/6p1/8/6p1/8/8

#2

2 + 5

15239 Valois Notebooks 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxg7#
    • 1...Rb8
      • 2.Qxg7#
    • 1...Rc8
      • 2.Qxg7#
    • 1...Rd8
      • 2.Qxd8#
      • 2.Qxg7#
    • 1...Re8
      • 2.Qxg7#
      • 2.Qxe8#
    • 1...Rf8
      • 2.Qxf8#
      • 2.Qxg7#
    • 1...g4
      • 2.Qh4#
  • Tries
    • 1.Qb7?
      • threat
        • 2.Qh1#
      • 1...Ra8
        • 2.Qxa8#
        • 2.Qxg7#
      • 1...Rb8
        • 2.Qxg7#
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxc8#
        • 2.Qxg7#
      • 1...Rd8
        • 2.Qxg7#
      • 1...Re8
        • 2.Qxg7#
      • 1...Rf8
        • 2.Qxg7#
      • 1...g2!
    • 1.Qc7?
      • 1...Ra8
        • 2.Qxg7#
      • 1...Rb8
        • 2.Qxb8#
        • 2.Qxg7#
      • 1...Rc8
        • 2.Qxg7#
        • 2.Qxc8#
      • 1...Rd8
        • 2.Qxd8#
        • 2.Qxg7#
      • 1...Re8
        • 2.Qxg7#
      • 1...Rf8
        • 2.Qxg7#
      • 1...g2
        • 2.Qh2#
      • 1...g4!
    • 1.Qd7?
      • threat
        • 2.Qh3#
      • 1...Ra8
        • 2.Qxg7#
      • 1...Rb8
        • 2.Qxg7#
      • 1...Rc8
        • 2.Qxc8#
        • 2.Qxg7#
      • 1...Rd8
        • 2.Qxg7#
        • 2.Qxd8#
      • 1...Re8
        • 2.Qxe8#
        • 2.Qxg7#
      • 1...Rf8
        • 2.Qxg7#
      • 1...g4!
  • Keys
    • 1.Qe5!
      • 1...Ra8
        • 2.Qxg7#
      • 1...Rb8
        • 2.Qxg7#
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxg7#
      • 1...Rd8
        • 2.Qxg7#
      • 1...Re8
        • 2.Qxg7#
        • 2.Qxe8#
      • 1...Rf8
        • 2.Qxg7#
      • 1...g2
        • 2.Qh2#
      • 1...g4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD,SBLOCK::QAB1(B),XP(c)
    • R(d);N_GUARD::QAB1(B),XP(c)
    • P(b);OGATE::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • R(d);N_GUARD::QAB1(B),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • R(d);N_GUARD,SBLOCK::QAB1(B),XP(c)
        • R(d);N_GUARD::QAB1(B),XP(c)
        • P(a);OGATE::QAR(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(d);N_GUARD,SBLOCK::QAB1(B),XP(c)
        • R(d);N_GUARD::QAB1(B),XP(c)
      • Refutation
        • P(b);
  • Actual
    • Q(B);P_PINP(c)
    • Vars
      • R(d);N_GUARD,SBLOCK::QAB1(B),XP(c)
      • R(d);N_GUARD::QAB1(B),XP(c)
      • P(a);OGATE::QAR(B)
      • P(b);OGATE::QAR(B)
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