MESON Chess Problem Database

Problem Display
PID: 9408 (8/8/4Q3/6pp/4Np1b/5k2/3P3R/1K6 w - - 0 1)

Berry, Charles Vincent E

Norwich Mercury, 1902

8/8/4Q3/6pp/4Np1b/5k2/3P3R/1K6

#2

5 + 5

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Rxf2#
    • 1...Bg3
      • 2.Sxg5#
  • Tries
    • 1.Sxg5+?
      • 1...Kg3
        • 2.Qh3#
      • 1...Bxg5!
    • 1.Sf6?
      • threat
        • 2.Qb3#
      • 1...Kg3
        • 2.Qh3#
      • 1...Bf2!
    • 1.Qb3+?
      • 1...Kg4
        • 2.Qh3#
      • 1...Kxe4!
    • 1.Qh3+?
      • 1...Bg3
        • 2.Sxg5#
      • 1...Kxe4!
  • Keys
    • 1.Sg3!
      • 1...Kxg3
        • 2.Qh3#
      • 1...Bxg3
        • 2.Qe2#
      • 1...fxg3
        • 2.Qf5#
      • 1...g4
        • 2.Qb3#

This anticipates 79462(1965)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::R1(C),XB(c)
    • B(c);N_GUARD,SBLOCK::S(D),XP(d)
  • Tries
    • Try
      • S(D);CHECK,XP(d)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • B(c);XS(D)
    • Try
      • S(D);
      • Threat
        • QAR(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • B(c);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(E);CHECK
      • Vars
        • B(c);P_SPINB(c)::S(D),XP(d)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(D)::QAR1(E)
      • B(c);SBLOCK,XS(D)::QAB1(E)
      • P(b);OGATEB,SBLOCK,XS(D)::QAR2(E)
      • P(d);SBLOCK::QAR(E)
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