MESON Chess Problem Database

Problem Display
PID: 218822 (8/p3N1K1/B1p1p3/3PP2Q/1B1kp3/6R1/5p2/8 w - - 0 1)

Green, S (= Laws, BG)

British Chess Magazine, 1923

8/p3N1K1/B1p1p3/3PP2Q/1B1kp3/6R1/5p2/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Rg4#
    • 1...cxd5
      • 2.Sc6#
    • 1...c5
      • 2.Bc3#
    • 1...exd5
      • 2.Sxc6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qb2#
      • 1...e3
        • 2.Qxe3#
      • 1...Kxe5!
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...Kxe5
        • 2.Qf6#
      • 1...e3
        • 2.Sxc6#
        • 2.Qxe3#
        • 2.Qf4#
      • 1...exf3!
  • Keys
    • 1.Qh2!
      • 1...Kxe5
        • 2.Rd3#
      • 1...cxd5
        • 2.Sc6#
      • 1...exd5
        • 2.Sxc6#
      • 1...e3
        • 2.Rg4#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#
      • 1...c5
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::R(A)
    • P(d);SBLOCK,XP(C)::S(G)
    • P(d);SBLOCK::B(B)
    • P(e);SBLOCK,XP(C)::S(G),XP(d)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • P(c);::QAB1(E),XP(c)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT,XP(D)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB1(E)
      • Refutation
        • P(c);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT,XP(D)::QAB(E)+R(A)
      • P(d);SBLOCK,XP(C)::S(G)
      • P(e);SBLOCK,XP(C)::S(G),XP(d)
      • P(c);OGATEB,SBLOCK::R(A)
      • P(a);OGATE::QAB(E)
      • P(d);SBLOCK::B(B)
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