MESON Chess Problem Database

Problem Display
PID: 455 (8/1bp1nr2/6p1/4N1Qp/1N2k3/1pr4p/2PnP3/3R2BK w - - 0 1)

Swords, WJ

Prize, The Observer, 1955

8/1bp1nr2/6p1/4N1Qp/1N2k3/1pr4p/2PnP3/3R2BK

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
      • 2.exd3#
    • 1...Sb1
      • 2.Rd4#
    • 1...Sf1
      • 2.Rd4#
    • 1...Sc4
      • 2.Rd4#
  • Keys
    • 1.Sed3!
      • threat
        • 2.Qe5#
      • 1...Rxd3
        • 2.cxd3#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Rf5
        • 2.Qe3#
      • 1...Sf3
        • 2.Sf2#
      • 1...Sc4
        • 2.Sc5#
      • 1...Sf5
        • 2.Qf4#
      • 1...Sc6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE::R1(A)
  • Actual
    • S(G);
    • Threat
      • QAR1(H)
    • Vars
      • R(c);OGATE,XS(G)::P(D),XR(c)
      • R(c);N_GUARD::S(G),XR(c)
      • R(k);SBLOCK::QAR1(H)
      • S(a);S_CUTR(k)::S(G)
      • S(a);S_CUTR(c)::S(G)
      • S(j);S_CUTR(k)::QAR1(H)
      • S(j);N_GUARD,S_CUTB(h)::QAB1(H)
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