MESON Chess Problem Database

Problem Display
PID: 116126 (8/8/1p6/1K2Q3/8/2pk4/8/1R2B3 w - - 0 1)

Godbout, Alain J

Matou, 1990

8/8/1p6/1K2Q3/8/2pk4/8/1R2B3

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qe4#
      • 2.Qf5#
    • 1...c2
      • 2.Rb3#
  • Tries
    • 1.Kb4?
      • 1...Kc2
        • 2.Qe4#
        • 2.Qf5#
      • 1...c2
        • 2.Rb3#
      • 1...b5!
    • 1.Kxb6?
      • 1...Kc2
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kc4
        • 2.Qe4#
      • 1...c2!
    • 1.Rb2?
      • 1...c2
        • 2.Rb3#
      • 1...cxb2!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Rd1#
      • 1...Kxe2!
    • 1.Qe3+?
      • 1...Kc2
        • 2.Qe4#
      • 1...Kxe3!
    • 1.Qe6?
      • 1...Kc2
        • 2.Qf5#
        • 2.Qe4#
        • 2.Qg6#
      • 1...Kd4
        • 2.Rd1#
      • 1...c2!
    • 1.Qe7?
      • 1...Kc2
        • 2.Qe4#
        • 2.Qh7#
      • 1...Kd4
        • 2.Rd1#
      • 1...c2!
    • 1.Qe8?
      • 1...Kc2
        • 2.Qg6#
        • 2.Qe4#
      • 1...Kd4
        • 2.Rd1#
      • 1...c2!
  • Keys
    • 1.Ra1!
      • 1...Kc2
        • 2.Qxc3#
      • 1...c2
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB,SBLOCK::R(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);OGATEB,SBLOCK::R(A)
      • Refutation
        • P(c);
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • K(b);S_FLIGHT::QAR2(D)
      • Refutation
        • P(a);
    • Try
      • R(A);
      • Vars
        • P(a);OGATEB,SBLOCK::R(A)
      • Refutation
        • P(a);XR(A)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • P(a);
  • Actual
    • R(A);
    • Vars
      • K(b);S_FLIGHT::QAR1(D),XP(a)
      • P(a);OGATEB,SBLOCK::R(A)
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