MESON Chess Problem Database

Problem Display
PID: 39121 (KNqbrrbB/p1kppp2/P1P4R/7R/2N5/7B/8/1Q6 w - - 0 1)

Reeves, Alfred Christopher

The Problemist, 2001

KNqbrrbB/p1kppp2/P1P4R/7R/2N5/7B/8/1Q6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7+
      • 2.Qxb7#
    • 1...Qxb8+
      • 2.Qxb8#
    • 1...dxc6
      • 2.Be5#
      • 2.Rxc6#
    • 1...d5
      • 2.Be5#
  • Tries
    • 1.Kxa7?
      • threat
        • 2.Qb6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qxb8+
        • 2.Qxb8#
      • 1...Qxa6+!
    • 1.Bc3?
      • threat
        • 2.Ba5#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qxb8+
        • 2.Qxb8#
      • 1...Qxa6!
    • 1.Qb4?
      • threat
        • 2.Qa5#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qxb8+
        • 2.Qxb8#
      • 1...Qxa6!
    • 1.Qb5?
      • threat
        • 2.Qa5#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qxb8+
        • 2.Qxb8#
      • 1...Qxa6!
  • Keys
    • 1.cxd7!
      • threat
        • 2.Be5#
        • 2.Rc5#
        • 2.Rc6#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qxb8+
        • 2.Qxb8#
      • 1...Qxa6
        • 2.Sxa6#
      • 1...Qxd7
        • 2.Qb7#
      • 1...Bh7
        • 2.Be5#
        • 2.Rc5#
        • 2.Rc6#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...e6
        • 2.Be5#
        • 2.Rc5#
      • 1...f5
        • 2.Be5#
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);CHECK,N_GUARD,N_PINS(I)::QAR1(A),XQ(f)
    • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
    • P(c);N_GUARD::B(J)
  • Tries
    • Try
      • K(H);N_SPINS(I),P-FLIGHT,XP(a)
      • Threat
        • QAB1(A)
      • Vars
        • Q(f);CHECK,N_GUARD::QAR1(A),XQ(f)
        • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
      • Refutation
        • Q(f);CHECK,XP(E)
    • Try
      • B(J);
      • Threat
        • B(J)
      • Vars
        • Q(f);CHECK,N_GUARD,N_PINS(I)::QAR1(A),XQ(f)
        • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
      • Refutation
        • Q(f);N_PINS(I),XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(f);CHECK,N_GUARD,N_PINS(I)::QAR1(A),XQ(f)
        • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
      • Refutation
        • Q(f);N_PINS(I),XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(f);CHECK,N_GUARD,N_PINS(I)::QAR1(A),XQ(f)
        • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
      • Refutation
        • Q(f);N_PINS(I),XP(E)
  • Actual
    • P(F);XP(c)
    • Threat
      • DUALS(5)
    • Vars
      • Q(f);CHECK,N_GUARD,N_PINS(I)::QAR1(A),XQ(f)
      • Q(f);CHECK,OGATE,XS(I)::QAB1(A),XQ(f)
      • Q(f);N_PINS(I),XP(E)::S(I),XQ(f)
      • Q(f);N_GUARD,N_PINS(I),XP(F)::QAR1(A)
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