MESON Chess Problem Database

Problem Display
PID: 218281 (6n1/4p3/1p1p4/4kPB1/3rP3/3p2K1/5N2/Q7 w - - 0 1)

Evans, WJC

British Chess Magazine, 1921

6n1/4p3/1p1p4/4kPB1/3rP3/3p2K1/5N2/Q7

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Bf4#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Sxd3#
        • 2.Sg4#
      • 1...Sf6
        • 2.Sxd3#
        • 2.Bf4#
      • 1...Sh6
        • 2.Sxd3#
      • 1...d2
        • 2.Sd3#
        • 2.Sg4#
      • 1...d5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sg4#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Ra4
        • 2.Qd5#
      • 1...Rb4
        • 2.Qd5#
      • 1...Rc4
        • 2.Qd5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5
        • 2.Qb8#
      • 1...Sf6
        • 2.Bf4#
      • 1...Sh6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(g);SBLOCK::B(F)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(g);::S(B),XP(a)
      • Refutation
        • P(e);
  • Actual
    • Q(A);N_PINR(b)
    • Threat
      • S(B)
    • Vars
      • R(b);OGATE,XP(D)::QAR1(A),XR(b)
      • R(b);N_GUARD::QAR1(A)
      • R(b);N_GUARD::QAR1(A),XR(b)
      • P(e);OGATEB::QAB(A)
      • S(g);SBLOCK::B(F)
      • S(g);OGATE::QAB(A)
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