MESON Chess Problem Database

Problem Display
PID: 267130 (3rnBB1/1n4p1/1r4P1/4k2p/q1R1NR1K/1pP1Pp2/3N4/3b4 w - - 0 1)

Evans, DW

The Problemist, 1955

3rnBB1/1n4p1/1r4P1/4k2p/q1R1NR1K/1pP1Pp2/3N4/3b4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Sxc4#
    • 1...Rd4
      • 2.cxd4#
    • 1...Bc2
      • 2.Sxf3#
    • 1...Sbd6
      • 2.Rc5#
    • 1...Sed6
      • 2.Bxg7#
  • Tries
    • 1.Rc5+?
      • 1...Rd5
        • 2.Rxd5#
      • 1...Sxc5!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Rf5#
      • 1...Qxc4
        • 2.Sxc4#
      • 1...Qd7
        • 2.Rce4#
      • 1...Rf6
        • 2.Rfe4#
      • 1...Rd4
        • 2.cxd4#
      • 1...Bc2
        • 2.Sxf3#
      • 1...Sbd6
        • 2.Rc5#
      • 1...Sed6
        • 2.Bxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(d);XR(D)::S(A),XQ(d)
    • R(j);OGATE::P(B),XR(j)
    • B(a);N_GUARD::S(A),XP(c)
    • S(h);N_GUARD,S_CUTR(j)::R(D)
    • S(k);N_GUARD,S_CUTR(g)::B(I),XP(i)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(j);N_GUARD,P_SPINR(j)::R1(D),XR(j)
      • Refutation
        • S(h);XR(D)
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • Q(d);P_PINR(F),XR(D)::S(A),XQ(d)
      • Q(d);N_GUARD::R1(D)
      • R(g);SBLOCK::R1(F)
      • R(j);OGATE,P_PINR(F)::P(B),XR(j)
      • B(a);N_GUARD::S(A),XP(c)
      • S(h);N_GUARD,S_CUTR(j)::R(D)
      • S(k);N_GUARD,SBLOCK,S_CUTR(g)::B(I),XP(i)
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