MESON Chess Problem Database

Problem Display
PID: 135113 (b7/2r2PK1/2n2Q2/2p3RB/Ppk2Nn1/2q1p3/P1R2br1/2N5 w - - 0 1)

Matthews, Robin CO

2nd Prize, British Chess Magazine, 1949

b7/2r2PK1/2n2Q2/2p3RB/Ppk2Nn1/2q1p3/P1R2br1/2N5

#2

10 + 11

14609 Mostly Three=Movers 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7+
      • 2.Bxf7#
    • 1...Sh2
      • 2.Be2#
    • 1...Sh6
      • 2.Be2#
    • 1...b3
      • 2.Qxc3#
  • Keys
    • 1.Sb3!
      • threat
        • 2.Rxc5#
      • 1...Rxf7+
        • 2.Bxf7#
      • 1...Sxf6
        • 2.Be2#
      • 1...Sh2
        • 2.Be2#
      • 1...Sge5
        • 2.Qe6#
      • 1...Sh6
        • 2.Be2#
      • 1...Sd4
        • 2.Sa5#
      • 1...Sa5
        • 2.Sxa5#
      • 1...Sce5
        • 2.Qa6#
      • 1...Sa7
        • 2.Sa5#
      • 1...Se7
        • 2.Sa5#
      • 1...Sb8
        • 2.Sa5#
      • 1...Sd8
        • 2.Sa5#
      • 1...e2
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • R(j);CHECK,OGATE,XP(I)::B(G),XR(j)
    • S(g);OGATE,P_PINR(F)::B(G)
    • P(e);N_GUARD::QAR1(H),XQ(c)
  • Actual
    • S(A);
    • Threat
      • R1(F),XP(h)
    • Vars
      • R(j);CHECK,OGATE,XP(I)::B(G),XR(j)
      • S(g);OGATE,P_PINR(F),XQ(H)::B(G)
      • S(g);OGATE,P_PINR(F)::B(G)
      • S(g);N_PINQ(H),P_PINR(F)::QAB(H)
      • S(i);N_GUARD,N_PINQ(H)::S(A)
      • S(i);N_GUARD::S(A),XS(i)
      • S(i);N_PINQ(H)::QAB(H)
      • S(i);N_GUARD::S(A)
      • S(i);N_GUARD,N_PINP(I)::S(A)
      • P(d);N_GUARD::S(A)
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