MESON Chess Problem Database

Problem Display
PID: 272664 (2N2R2/6nK/2P1k1B1/1pB3R1/4q2p/8/4Q3/r3r3 w - - 0 1)

Fox, Matthew

The Problemist, 1957

2N2R2/6nK/2P1k1B1/1pB3R1/4q2p/8/4Q3/r3r3

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Rb1
      • 2.Qxe4#
    • 1...Rc1
      • 2.Qxe4#
    • 1...Rd1
      • 2.Qxe4#
    • 1...Rf1
      • 2.Qxe4#
    • 1...Rg1
      • 2.Qxe4#
    • 1...Rh1
      • 2.Qxe4#
  • Tries
    • 1.Kxg7?
      • threat
        • 2.Bf7#
        • 2.Rf6#
        • 2.Re8#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Rf1
        • 2.Re8#
        • 2.Qxe4#
      • 1...Ra7+!
    • 1.Rgf5?
      • threat
        • 2.R8f6#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Sh5
        • 2.Re8#
      • 1...Se8
        • 2.Rxe8#
      • 1...Sxf5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Rf6#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Sf5
        • 2.Bf7#
      • 1...Rf1
        • 2.Qxe4#
      • 1...Sh5
        • 2.Re8#
      • 1...Se8
        • 2.Rxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,N_PINB(E)::R1(C),XQ(c)
    • R(b);N_GUARD::QAR2(A),XQ(c)
  • Tries
    • Try
      • K(F);N_SPINB(E),P-FLIGHT,XS(g)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,N_GUARD::R1(C),XQ(c)
      • Refutation
        • R(a);CHECK
    • Try
      • R(C);N_SPINB(E)
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD::R1(C),XQ(c)
        • S(g);N_GUARD::R(H)
        • S(g);N_GUARD::R(H),XS(g)
      • Refutation
        • S(g);XR(C)
  • Actual
    • B(B);
    • Threat
      • R1(H)
    • Vars
      • Q(c);N_GUARD,N_PINB(E)::R1(C),XQ(c)
      • S(g);N_PINB(E)::B(E)
      • R(b);N_GUARD::QAR2(A),XQ(c)
      • S(g);N_GUARD::R(H)
      • S(g);N_GUARD::R(H),XS(g)
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