MESON Chess Problem Database

Problem Display
PID: 51437 (n1rN4/2p2rp1/4P3/K2p4/1p2k2N/1Rb2R2/Pp1pp2Q/2q2bBB w - - 0 1)

Ravenscroft, Frank

The Guardian, 1960

n1rN4/2p2rp1/4P3/K2p4/1p2k2N/1Rb2R2/Pp1pp2Q/2q2bBB

#2

10 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rd7
      • 2.Qf4#
    • 1...Re7
      • 2.Qf4#
    • 1...Bh3
      • 2.Qxe2#
    • 1...Bd4
      • 2.Rfe3#
    • 1...Be5
      • 2.Rf4#
    • 1...Bf6
      • 2.Rxf1#
      • 2.Qf4#
    • 1...d4
      • 2.Re3#
  • Tries
    • 1.Rxb4+?
      • 1...Bd4
        • 2.Re3#
        • 2.Rxd4#
      • 1...d4
        • 2.Re3#
      • 1...Bxb4+!
    • 1.Rfxc3+?
      • 1...Rf3
        • 2.Bxf3#
      • 1...Bg2!
    • 1.Rf4+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Rxf7#
      • 1...Kd3!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Sc5#
      • 1...Rf4
        • 2.Qxf4#
      • 1...d4
        • 2.Re3#
      • 1...Bd4
        • 2.Rfe3#
      • 1...Be5
        • 2.Rf4#
      • 1...Bf6
        • 2.Rxf1#
        • 2.Qf4#
      • 1...c5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(k);N_GUARD::QAR1(D),XR(k)
    • R(k);N_GUARD::QAR1(D)
    • B(b);N_GUARD::QAR2(D),XP(e)
    • B(f);SBLOCK::B(B)+R(F),DCHECK
    • P(i);SBLOCK::B(B)+R(F),DCHECK
  • Tries
    • Try
      • R(E);CHECK,P_SPINR(E),XP(g)
      • Vars
        • P(i);P_SPINP(i)::B(B)+R(F),DCHECK
      • Refutation
        • B(f);CHECK,XR(E)
    • Try
      • R(F);CHECK,XB(f)
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::B(B),XR(k)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • R(F);CHECK
      • Refutation
        • K(h);P_SPINB(f),S_FLIGHT
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • R(k);N_GUARD::QAR1(D),XR(k)
      • P(i);SBLOCK::B(B)+R(F),DCHECK
      • B(f);SBLOCK::B(B)+R(F),DCHECK
      • P(j);N_GUARD::S(J)
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