MESON Chess Problem Database

Problem Display
PID: 9412 (3R1B2/5P2/4Np2/n3k2K/R5B1/2q2pP1/bQ2Prn1/2r1b3 w - - 0 1)

Blake, Percy Francis

Norwood News, 1902

3R1B2/5P2/4Np2/n3k2K/R5B1/2q2pP1/bQ2Prn1/2r1b3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Bd5
      • 2.Bd6#
    • 1...Sf4+
      • 2.gxf4#
  • Tries
    • 1.Qb5+?
      • 1...Bd5
        • 2.Bd6#
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Qc5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Re4#
      • 1...Bxf7+
        • 2.Sxf7#
      • 1...Sf4+
        • 2.gxf4#
      • 1...Rxe2
        • 2.Sxf3#
      • 1...fxg5
        • 2.Bg7#
      • 1...f5
        • 2.Bg7#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Bb1
        • 2.Rxa5#
      • 1...Bc4
        • 2.Qb8#
      • 1...Bd5
        • 2.Bd6#
      • 1...Sc4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(f);OGATE::QAB1(A),XQ(f)
    • B(c);SBLOCK::B(J)
    • S(e);CHECK,OGATE::P(C),XS(e)
  • Tries
    • Try
      • Q(A);CHECK,N_PINQ(f)
      • Refutation
        • Q(f);P_SPINQ(f)
  • Actual
    • S(G);
    • Threat
      • R1(D)
    • Vars
      • B(c);CHECK,XP(H)::S(G),XB(c)
      • S(e);CHECK,OGATE::P(C),XS(e)
      • R(d);N_GUARD,XP(B)::S(G),XP(g)
      • P(j);OGATEB,XS(G)::B(J)
      • P(j);OGATEB::B(J)
      • Q(f);OGATE::QAB1(A),XQ(f)
      • B(c);N_GUARD::R(D),XS(h)
      • B(c);::QAB(A)
      • B(c);SBLOCK::B(J)
      • S(h);S_CUTB(c)::QAR(A)
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Developed and maintained by Brian Stephenson.
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