MESON Chess Problem Database

Problem Display
PID: 134580 (KB1Rr3/p4N2/2Qr2p1/4p3/4Nk2/3p1bpB/1p1PP1Pn/1q1n1R2 w - - 0 1)

Massingham, HW

The Field, 1965

(First published on Thu Aug 5 1965)

KB1Rr3/p4N2/2Qr2p1/4p3/4Nk2/3p1bpB/1p1PP1Pn/1q1n1R2

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.e3#
    • 1...Sc3
      • 2.e3#
    • 1...Sg4
      • 2.Rxf3#
  • Tries
    • 1.Sexd6?
      • threat
        • 2.Qe4#
      • 1...Sxf1
        • 2.Qxf3#
      • 1...e4
        • 2.Sxe8#
      • 1...Sf2
        • 2.e3#
      • 1...Sc3
        • 2.e3#
      • 1...dxe2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe4#
      • 1...Rxc6
        • 2.Rd4#
      • 1...Sxc3
        • 2.e3#
      • 1...Sxf1
        • 2.Qxf3#
      • 1...dxe2
        • 2.Sxe2#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Rd5
        • 2.Qf6#
      • 1...Sf2
        • 2.e3#
      • 1...e4
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,N_SPINB(f)::P(C)
    • S(b);N_GUARD::P(C)
    • S(d);N_GUARD::R1(A),XB(f)
  • Tries
    • Try
      • S(F);P_SPINQ(G),XR(j)
      • Threat
        • QAR1(G)
      • Vars
        • S(d);N_GUARD,N_SPINB(f),XR(A)::QAR1(G),XB(f)
        • P(i);N_PINQ(G)::B(J)+S(F),XR(m)
        • S(b);N_GUARD,N_SPINB(f)::P(C)
        • S(b);N_GUARD::P(C)
      • Refutation
        • P(e);XP(C)
  • Actual
    • S(F);P_SPINQ(G)
    • Threat
      • QAR1(G)
    • Vars
      • R(j);OGATE,P_SPINP(i),XQ(G)::R(K)
      • S(b);N_GUARD,XS(F)::P(C)
      • S(d);N_GUARD,N_SPINB(f),XR(A)::QAR1(G),XB(f)
      • P(e);XP(C)::S(F),XP(e)
      • R(j);OGATE,P_SPINP(i)::R(K),XR(j)
      • R(j);N_PINQ(G),P_SPINP(i)::QAR2(G)
      • S(b);N_GUARD,N_SPINB(f)::P(C)
      • P(i);N_PINQ(G),P_SPINR(j),SBLOCK::S(F)
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