MESON Chess Problem Database

Problem Display
PID: 203045 (8/qpnQ4/b1P4B/1B2p3/3pk3/1r2p2R/1pPp4/1Kb5 w - - 0 1)

Goldstein, Alexander

The Problemist, 1983

8/qpnQ4/b1P4B/1B2p3/3pk3/1r2p2R/1pPp4/1Kb5

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
    • 1...Sd5
      • 2.Qh7#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Qg4#
        • 2.Qh7#
      • 1...Se6
        • 2.Qh7#
      • 1...d1Q
        • 2.Qh7#
      • 1...d1B
        • 2.Qh7#
      • 1...Sd5
        • 2.Bxd5#
        • 2.Qh7#
      • 1...d3
        • 2.Qg4#
      • 1...Bxc4!
  • Keys
    • 1.c4!
      • threat
        • 2.Qh7#
      • 1...Kd3
        • 2.Rxe3#
      • 1...dxc4 ep
        • 2.Qd3#
      • 1...d3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATE::P(B),XR(d)
    • S(l);SBLOCK::QAB(G)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(l);::QAB(G)
        • P(c);::QAB(G)
        • P(f);::QAR2(G)
      • Refutation
        • B(i);XB(D)
  • Actual
    • P(B);
    • Threat
      • QAB(G)
    • Vars
      • K(g);P_SPINP(e),S_FLIGHT::R1(C),XP(e)
      • P(f);EP,OGATE,XP(B)::QAB1(G)
      • P(f);SBLOCK::QAR2(G)
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