MESON Chess Problem Database

Problem Display
PID: 48652 (8/N2K4/6N1/2pk4/p5P1/P1b5/2P5/1Q3RB1 w - - 0 1)

Heywood, George C

Source?, 0000

8/N2K4/6N1/2pk4/p5P1/P1b5/2P5/1Q3RB1

#2

9 + 4

508 Chess Chips 1878

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qa2#
    • 1...Ke4
      • 2.Qb7#
    • 1...c4
      • 2.Qb7#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Qb7#
      • 1...Bb2
        • 2.c4#
      • 1...Bb4
        • 2.c4#
      • 1...Bd4!
    • 1.Rf5+?
      • 1...Kc4
        • 2.Rxc5#
        • 2.Qa2#
        • 2.Qf1#
        • 2.Qb5#
      • 1...Ke4
        • 2.Qb7#
      • 1...Be5!
    • 1.Qa2+?
      • 1...Ke4
        • 2.Rf4#
      • 1...c4!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Rf4#
        • 2.Qb7#
      • 1...c4
        • 2.Qb7#
      • 1...axb3!
    • 1.Qb6?
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qxc5#
        • 2.Qe6#
      • 1...Ke4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Be5!
  • Keys
    • 1.Rc1!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Qb7#
      • 1...Ba1
        • 2.c4#
      • 1...Be1
        • 2.c4#
      • 1...Bb2
        • 2.c4#
      • 1...Bd2
        • 2.c4#
      • 1...Bb4
        • 2.c4#
      • 1...Bd4
        • 2.c4#
      • 1...Ba5
        • 2.c4#
      • 1...Be5
        • 2.c4#
      • 1...Bf6
        • 2.c4#
      • 1...Bg7
        • 2.c4#
      • 1...Bh8
        • 2.c4#
      • 1...c4
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB(A)
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB(A)
      • Vars
        • B(a);OGATE::P(D)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(A)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::R1(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAB(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • B(a);
  • Actual
    • R(B);
    • Vars
      • K(d);S_FLIGHT::QAB(A)
      • B(a);OGATE::P(D)
      • P(c);SBLOCK::QAB(A)
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