MESON Chess Problem Database

Problem Display
PID: 100826 (1b5R/2pB4/qr2R1p1/1r4p1/b3P1k1/6NN/4P2K/8 w - - 0 1)

Allison, Christopher John

The Field, 1954

(First published on Thu Jan 7 1954)

1b5R/2pB4/qr2R1p1/1r4p1/b3P1k1/6NN/4P2K/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rc6#
    • 1...Rb2
      • 2.Rc6#
    • 1...Rb3
      • 2.Rc6#
    • 1...Rb4
      • 2.Rc6#
    • 1...c5
      • 2.Rxb6#
      • 2.Rc6#
      • 2.Rd6#
    • 1...c6
      • 2.Re5#
  • Tries
    • 1.Sh1?
      • threat
        • 2.S1f2#
      • 1...c5+
        • 2.Rd6#
      • 1...c6+
        • 2.Re5#
      • 1...Rf5!
    • 1.Rf6+?
      • 1...Re6
        • 2.Sf2#
      • 1...Rf5!
    • 1.Rxg6+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.Rxg5#
      • 1...Re6!
    • 1.Rh4+?
      • 1...gxh4
        • 2.Rxg6#
      • 1...Kxh4!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Se3#
      • 1...c5+
        • 2.Rd6#
      • 1...c6+
        • 2.Re5#
      • 1...Rb3
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::B(G)+R(F)
    • R(c);N_GUARD,P_PINP(A)::B(G)+R(F)
    • P(h);P_PINS(C),S_CUTR(f)::B(G)+R(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(h);CHECK,S_CUTR(c)::B(G)+R(F)
        • P(h);CHECK,S_CUTR(f)::B(G)+R(F)
      • Refutation
        • R(c);
    • Try
      • R(F);CHECK
      • Vars
        • R(f);P_SPINR(f)::S(D)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(F);CHECK,P_PINP(d),XP(g)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • R(H);CHECK
      • Vars
        • P(d);SBLOCK,XR(H)::B(G)+R(F),DCHECK,XP(g)
      • Refutation
        • K(b);P-FLIGHT,XR(H)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • P(h);CHECK,S_CUTR(c)::B(G)+R(F)
      • P(h);CHECK,S_CUTR(f)::B(G)+R(F)
      • R(c);N_GUARD::B(G)+R(F)
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