MESON Chess Problem Database

Problem Display
PID: 10311 (K2R4/3N2p1/5P1b/2N1Ppq1/2pkP3/2np3b/5P2/B2Q4 w - - 0 1)

Ravenscroft, Frank

Problem (Zagreb), 1963

K2R4/3N2p1/5P1b/2N1Ppq1/2pkP3/2np3b/5P2/B2Q4

#2

10 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1?
      • threat
        • 2.Se6#
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...Qxf6
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Qc1
        • 2.Se6#
      • 1...Qd2
        • 2.Se6#
      • 1...Qe3
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...f4
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...d2!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.S7c5#
      • 1...Kxe4
        • 2.S7c5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...cxd3
        • 2.Qa4#
      • 1...fxe4
        • 2.Sf4#
      • 1...f4
        • 2.S3c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);OGATE,XP(D)::QAR1(B),XP(f)
        • Q(g);::S(E)
      • Refutation
        • P(b);
  • Actual
    • S(E);XP(b)
    • Threat
      • R(J)+S(H)
    • Vars
      • K(e);N_SPINS(a),P-FLIGHT,XP(D)::S(H)
      • Q(g);XP(G)::R(J)+S(H),XQ(g)
      • P(d);OGATEB,P_SPINP(d),SBLOCK,XS(E)::QAR(B)
      • P(f);SBLOCK,XP(D)::QAR(B)+S(E)
      • P(f);S_CUTQ(g)::QAR(B)+S(E)
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Developed and maintained by Brian Stephenson.
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