MESON Chess Problem Database

Problem Display
PID: 144392 (n3R3/KB3p1q/Q2NP2r/2p1k1B1/3N2b1/p1r1P3/8/8 w - - 0 1)

Fry, Lawrence J

Stephenson, Brian D

British Chess Magazine, 1994

n3R3/KB3p1q/Q2NP2r/2p1k1B1/3N2b1/p1r1P3/8/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxf7#
    • 1...Qc2
      • 2.Sxf7#
    • 1...Qd3
      • 2.Sxf7#
    • 1...Qe4
      • 2.Sxf7#
    • 1...Qh8
      • 2.Sxf7#
    • 1...Rb3
      • 2.Sc4#
    • 1...Rd3
      • 2.Sc4#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Bf3
      • 2.Sxf3#
    • 1...Bh3
      • 2.Sf3#
    • 1...Bf5
      • 2.Sf3#
    • 1...Bxe6
      • 2.Sf3#
    • 1...f6
      • 2.Bf4#
  • Tries
    • 1.exf7+?
      • 1...Be6
        • 2.Sf3#
      • 1...Re6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Sc6#
      • 1...Kxd6
        • 2.Bf4#
      • 1...Qxd3
        • 2.Sxf7#
      • 1...Rxd3
        • 2.Sc4#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Qe4
        • 2.Sxf7#
      • 1...Bf3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD::S(E),XP(g)
    • R(b);N_GUARD::S(E)
    • R(b);N_GUARD::S(E),XR(b)
    • B(c);N_GUARD::S(B),XB(c)
    • B(c);N_GUARD::S(B)
    • B(c);N_GUARD,P_SPINB(c),XP(F)::S(B)
    • P(g);P_PINB(H),SBLOCK::B(C)
  • Tries
    • Try
      • P(F);CHECK,XP(g)
      • Vars
        • B(c);P_SPINB(c)::S(B)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(D);
    • Threat
      • S(B)
    • Vars
      • K(e);S_FLIGHT,XS(E)::B(C)
      • Q(h);N_GUARD,XQ(D)::S(E),XP(g)
      • R(b);N_GUARD,XQ(D)::S(E)
      • P(d);OGATE,XS(B)::QAB1(D),XP(d)
      • Q(h);N_GUARD::S(E),XP(g)
      • B(c);N_GUARD::S(B),XB(c)
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Developed and maintained by Brian Stephenson.
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