MESON Chess Problem Database

Problem Display
PID: 1984 (8/5N2/4p3/2K5/4k3/7R/3B2Rn/3b3Q w - - 0 1)

Loyd, Sam

Wilke's Spirit of the Times, 1867

8/5N2/4p3/2K5/4k3/7R/3B2Rn/3b3Q

#2

6 + 4

1679 American Chess Nuts 1868
499 Chess Problems (Rayner) 1890
5206 Sam Loyd and His Chess Problems 1913
3360 Simple Two-move Themes 1924
268 Chess Life 1967
3310 2345 Chess Problems 1997
145 StrateGems 2005
5454 Near Snap 2007
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qb1#
    • 1...Bg4
      • 2.Qb1#
    • 1...Bh5
      • 2.Qb1#
    • 1...e5
      • 2.Sd6#
  • Tries
    • 1.Rf2+?
      • 1...Bf3
        • 2.Qb1#
      • 1...Sf3!
    • 1.Rgxh2+?
      • 1...Bf3
        • 2.Qxf3#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Rg5+?
      • 1...Bf3
        • 2.Qb1#
      • 1...Sf3!
    • 1.Qe1+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Be2!
    • 1.Qxh2?
      • threat
        • 2.Sd6#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kf5
        • 2.Qf4#
        • 2.Qe5#
      • 1...e5
        • 2.Sd6#
        • 2.Qxe5#
      • 1...Bf3!
  • Keys
    • 1.Rf3!
      • 1...Kxf3
        • 2.Sg5#
      • 1...Bxf3
        • 2.Qb1#
      • 1...Sxf3
        • 2.Qh7#
      • 1...Bc2
        • 2.Re2#
      • 1...Be2
        • 2.Rxe2#
      • 1...Bb3
        • 2.Re2#
      • 1...Ba4
        • 2.Re2#
      • 1...Sf1
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...e5
        • 2.Sg5#

This anticipates 2185(1887)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::QAB(A)
    • P(d);SBLOCK::S(F)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::QAB(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(C);CHECK,XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::QAB(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);
  • Actual
    • R(D);
    • Vars
      • K(c);S_FLIGHT,XR(D)::S(F)
      • B(a);OGATE,SBLOCK,XR(D)::QAB(A)
      • S(b);OGATE,SBLOCK,XR(D)::QAB(A)
      • B(a);N_GUARD::R(C)
      • B(a);N_GUARD::R(C),XB(a)
      • S(b);N_GUARD::R(C)
      • S(b);N_GUARD::R(C),XS(b)
      • P(d);SBLOCK::S(F)
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