MESON Chess Problem Database

Problem Display
PID: 148063 (8/8/3K1P2/3p2B1/4k3/1N5R/6Rn/6nQ w - - 0 1)

Anonymous

Manchester Weekly Times, 1921

(First published on Sat Mar 12 1921)

8/8/3K1P2/3p2B1/4k3/1N5R/6Rn/6nQ

#2

7 + 4

14868 Pirnie Collection 2013
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qb1#
    • 1...Sgf3
      • 2.Qb1#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Qxg1#
      • 1...Kf5!
    • 1.Rxg1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Kf5!
    • 1.Rf2+?
      • 1...Sgf3
        • 2.Qb1#
      • 1...Shf3!
    • 1.Rgxh2+?
      • 1...Sf3
        • 2.Qxf3#
        • 2.Qb1#
      • 1...Kf5!
  • Keys
    • 1.Rf3!
      • 1...Kxf3
        • 2.Sd2#
      • 1...Sgxf3
        • 2.Qb1#
      • 1...Shxf3
        • 2.Qh7#
      • 1...Se2
        • 2.Rxe2#
      • 1...Sh3
        • 2.Re2#
      • 1...Sf1
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...d4
        • 2.Sd2#

Anticipated by 148059(1892)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(A),XS(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK,XS(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • S(a);OGATE,P_SPINS(a)::QAB(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(B);CHECK,XS(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(c);S_FLIGHT,XR(D)::S(C)
      • S(a);OGATE,SBLOCK,XR(D)::QAB(A)
      • S(b);OGATE,SBLOCK,XR(D)::QAB(A)
      • S(a);N_GUARD::R(B),XS(a)
      • S(a);N_GUARD::R(B)
      • S(b);N_GUARD::R(B)
      • S(b);N_GUARD::R(B),XS(b)
      • P(d);SBLOCK::S(C)
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