MESON Chess Problem Database

Problem Display
PID: 277095 (N7/q1Pp2K1/2P2Qp1/1B1k4/1Pr3rR/5P2/2PP2N1/3R2b1 w - - 0 1)

Ravenscroft, Frank

To Mat, 1962

N7/q1Pp2K1/2P2Qp1/1B1k4/1Pr3rR/5P2/2PP2N1/3R2b1

#2

13 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Sxc7#
    • 1...Rxg2
      • 2.Bxc4#
    • 1...Rg3
      • 2.Bxc4#
    • 1...Rg5
      • 2.Bxc4#
  • Tries
    • 1.Qf5+?
      • 1...Kd4
        • 2.Rxg4#
      • 1...Kd6
        • 2.c8S#
      • 1...gxf5+!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe5#
      • 1...Qxd4
        • 2.Sb6#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Rcxd4
        • 2.c4#
      • 1...Rgxd4
        • 2.Sf4#
      • 1...Bxd4
        • 2.Se3#
      • 1...Re4
        • 2.fxe4#
      • 1...Rg5
        • 2.Sf4#
      • 1...Bh2
        • 2.Se3#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(f);XP(K)::S(M),XQ(f)
    • R(c);N_GUARD,XS(D)::B(H),XR(b)
    • R(c);N_GUARD::B(H),XR(b)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,P_SPINR(c),S_CUTP(e)::R(G),XR(c)
        • K(d);N_GUARD,P-FLIGHT,S_CUTP(e)::P=S
      • Refutation
        • P(e);CHECK,XQ(J)
  • Actual
    • P(C);
    • Threat
      • QAR1(J)
    • Vars
      • Q(f);N_GUARD,P_PINQ(J),P_SPINQ(f),XP(C)::S(M)
      • Q(f);XP(K)::S(M),XQ(f)
      • R(b);OGATE,P_SPINR(b),XP(C)::P(B)
      • R(c);N_GUARD,P_SPINR(c),XP(C)::S(D)
      • B(a);N_GUARD,P_PINQ(J),P_SPINB(a),XP(C)::S(D)
      • R(c);OGATE::P(E),XR(c)
      • R(c);N_GUARD::S(D)
      • B(a);N_GUARD::S(D)
      • P(g);P_PINP(K),SBLOCK::QAB(J)
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