MESON Chess Problem Database

Problem Display
PID: 210404 (5RKn/pQN5/6p1/1BRp2B1/r3k3/1bPN2p1/8/8 w - - 0 1)

Dragoescu, Radu

The Problemist, 1985

5RKn/pQN5/6p1/1BRp2B1/r3k3/1bPN2p1/8/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxd5#
    • 1...Bd1
      • 2.Qxd5#
    • 1...Bc2
      • 2.Qxd5#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Rf4#
        • 2.Qe7#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Rc4
        • 2.S5b4#
      • 1...Sf7
        • 2.Sf6#
      • 1...Ra6
        • 2.Rf4#
      • 1...Bc4!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Sc5#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Sf7
        • 2.Re5#
      • 1...Rc4
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(a)::QAB1(F),XP(e)
    • B(a);N_GUARD::QAB1(F),XP(e)
  • Tries
    • Try
      • S(G);P_SPINS(G),XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::QAB1(F),XB(a)
        • R(c);N_PINS(G)::QAB(F)+S(G)
        • S(h);N_PINS(G)::QAB(F)+S(G),DCHECK
        • R(c);::R1(H)
      • Refutation
        • B(a);
  • Actual
    • R(D);P_SPINR(D),XP(e)
    • Threat
      • S(B)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XR(D)::QAB1(F),XB(a)
      • S(h);N_PINR(D)::QAB(F)+R(D),DCHECK
      • R(c);N_PINR(D)::QAB(F)+R(D),DCHECK
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Developed and maintained by Brian Stephenson.
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