MESON Chess Problem Database

Problem Display
PID: 23255 (1bKB4/3P4/1pQ5/6rq/2Nk1pP1/R1r2p2/B1R1PN2/5n2 w - - 0 1)

Saunders, Denis M

4th HM., The Problemist, 1996/II

1bKB4/3P4/1pQ5/6rq/2Nk1pP1/R1r2p2/B1R1PN2/5n2

#2

11 + 9

3936 The Wizard of Oz 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Rd3#
    • 1...Rd3
      • 2.Rxd3#
    • 1...Be5
      • 2.Bxb6#
  • Tries
    • 1.Bf6+?
      • 1...Be5
        • 2.Qd6#
        • 2.d8Q#
        • 2.d8R#
      • 1...Re5!
    • 1.Rd2+?
      • 1...Rd3
        • 2.Rdxd3#
        • 2.Raxd3#
      • 1...Sxd2!
    • 1.Qxb6+?
      • 1...Kd5
        • 2.Ra5#
      • 1...Rc5+!
    • 1.Qd6+?
      • 1...Rd5
        • 2.Bxb6#
      • 1...Bxd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxc3#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Ke3
        • 2.Bxb6#
      • 1...Kxe5
        • 2.Bf6#
      • 1...Rxc2
        • 2.Sxf3#
      • 1...Rxa3
        • 2.Qe4#
      • 1...Rb3
        • 2.Qe4#
      • 1...Rd3
        • 2.Qe4#
      • 1...Re3
        • 2.Qd5#
      • 1...Rc4
        • 2.Sxf3#
      • 1...Rc5
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE,XR(B)::R1(E)
    • R(b);OGATE::R1(E),XR(b)
    • B(i);S_CUTR(f)::B(K),XP(h)
  • Tries
    • Try
      • B(K);CHECK
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • R(B);CHECK
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(H);CHECK,P_SPINS(F),XP(h)
      • Vars
        • K(d);P-FLIGHT::R(E)
      • Refutation
        • R(f);CHECK,N_PINS(F),P_SPINR(f)
    • Try
      • Q(H);CHECK,P_SPINS(F)
      • Vars
        • R(f);P_SPINR(f)::B(K),XP(h)
      • Refutation
        • B(i);XQ(H)
  • Actual
    • S(F);P_SPINQ(H)
    • Threat
      • QAB1(H),XR(b)
    • Vars
      • R(b);CHECK,XQ(H)::S(F),XR(b)
      • K(d);P_SPINR(b),S_FLIGHT::B(K),XP(h)
      • K(d);OGATEB,S_FLIGHT,XS(F)::B(K)
      • R(b);N_GUARD,XR(B)::S(F),XP(c)
      • R(b);N_PINQ(H),XR(E)::QAR1(H)
      • R(b);N_PINQ(H)::QAR1(H)
      • R(b);N_GUARD::S(F),XP(c)
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