MESON Chess Problem Database

Problem Display
PID: 265188 (8/2R4Q/3pr3/1p6/3R3p/1P1KB1p1/4PPN1/r2k3N w - - 0 1)

Barnes, Barry Peter

The Problemist, 1994

8/2R4Q/3pr3/1p6/3R3p/1P1KB1p1/4PPN1/r2k3N

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Rxc1#
    • 1...Ra2
      • 2.Rc1#
    • 1...Ra3
      • 2.Rc1#
    • 1...Ra4
      • 2.Rc1#
    • 1...Ra5
      • 2.Rc1#
    • 1...Ra6
      • 2.Rc1#
    • 1...Ra7
      • 2.Rc1#
    • 1...Ra8
      • 2.Rc1#
    • 1...Rxe3+
      • 2.Kxe3#
    • 1...gxf2
      • 2.Sxf2#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Kc3#
      • 1...Rxe3+
        • 2.Kxe3#
      • 1...Ra4
        • 2.Rc1#
      • 1...b4
        • 2.Kc4#
      • 1...Re4!
    • 1.Qh5?
      • threat
        • 2.Kc3#
      • 1...Rxe3+
        • 2.Kxe3#
      • 1...Rc1
        • 2.Rxc1#
      • 1...Ra2
        • 2.Rc1#
      • 1...Ra4
        • 2.Rc1#
      • 1...Re4
        • 2.Kxe4#
      • 1...b4!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Kc3#
      • 1...Rxe3+
        • 2.Kxe3#
      • 1...hxg3
        • 2.Qh1#
      • 1...Rc1
        • 2.Rxc1#
      • 1...Ra2
        • 2.Rc1#
      • 1...Ra4
        • 2.Rc1#
      • 1...Re4
        • 2.Kxe4#
      • 1...b4
        • 2.Kc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::R1(I),XR(a)
    • R(a);N_GUARD::R1(I)
    • R(a);N_GUARD,P_PINP(E)::R1(I)
    • R(g);CHECK,XB(G)::R(H)+K(F),XR(g)
    • P(c);XP(C)::S(A),XP(c)
  • Tries
    • Try
      • R(I);
      • Threat
        • R(H)+K(F)
      • Vars
        • R(g);CHECK,XB(G)::R(H)+K(F),XR(g)
        • R(a);N_GUARD::R1(I)
        • P(e);::R(H)+K(F)
      • Refutation
        • R(g);
    • Try
      • Q(J);
      • Threat
        • R(H)+K(F)
      • Vars
        • R(g);CHECK,XB(G)::R(H)+K(F),XR(g)
        • R(a);N_GUARD::R1(I),XR(a)
        • R(a);N_GUARD::R1(I)
        • R(g);::R(H)+K(F),XR(g)
      • Refutation
        • P(e);
  • Actual
    • S(A);XP(c)
    • Threat
      • R(H)+K(F)
    • Vars
      • R(g);CHECK,XB(G)::R(H)+K(F),XR(g)
      • P(d);OGATE,XS(A)::QAR(J)
      • R(a);N_GUARD::R1(I),XR(a)
      • R(a);N_GUARD::R1(I)
      • R(g);::R(H)+K(F),XR(g)
      • P(e);::R(H)+K(F)
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