MESON Chess Problem Database

Problem Display
PID: 184274 (2br1N2/8/4n3/R2pPQ2/1pPk2K1/7R/2PN4/2n5 w - - 0 1)

Evans, TC

The Observer, 1928

(First published on Sun Apr 15 1928)

2br1N2/8/4n3/R2pPQ2/1pPk2K1/7R/2PN4/2n5

#2

9 + 7

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Sxe6#
    • 1...Re8
      • 2.Rxd5#
    • 1...Rxf8
      • 2.Rxd5#
    • 1...Ba6
      • 2.Sxe6#
    • 1...Bb7
      • 2.Sxe6#
    • 1...Bd7
      • 2.Rxd5#
    • 1...Sa2
      • 2.Rd3#
    • 1...Se2
      • 2.Rd3#
    • 1...Sb3
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...b3
      • 2.c3#
    • 1...dxc4
      • 2.Qe4#
      • 2.Qf2#
  • Keys
    • 1.Qf6!
      • 1...Sf4+
        • 2.e6#
      • 1...Sc5+
        • 2.e6#
      • 1...Sg5+
        • 2.e6#
      • 1...Sc7+
        • 2.e6#
      • 1...Sg7+
        • 2.e6#
      • 1...Sxf8+
        • 2.e6#
      • 1...Rxf8
        • 2.Rxd5#
      • 1...dxc4
        • 2.Qf2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Rd6
        • 2.exd6#
      • 1...Rd7
        • 2.Sxe6#
      • 1...Re8
        • 2.Rxd5#
      • 1...Ba6
        • 2.Sxe6#
      • 1...Bb7
        • 2.Sxe6#
      • 1...Bd7
        • 2.Rxd5#
      • 1...Sa2
        • 2.Rd3#
      • 1...Se2
        • 2.Rd3#
      • 1...Sb3
        • 2.Rd3#
      • 1...b3
        • 2.c3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(g);S_CUTB(f)::S(I),XS(e)
    • R(g);N_GUARD::R1(F),XP(d)
    • R(g);N_GUARD,XS(I)::R1(F),XP(d)
    • B(f);N_GUARD::S(I),XS(e)
    • B(f);S_CUTR(g)::R1(F),XP(d)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • P(b);N_GUARD::P(A)
  • Actual
    • Q(H);
    • Vars
      • S(e);CHECK,OGATE::QAB(H)+P(G)
      • S(e);CHECK,OGATE,XS(I)::QAB(H)+P(G)
      • R(g);N_GUARD,XS(I)::R1(F),XP(d)
      • P(d);XP(D)::QAB(H)
      • S(a);N_GUARD::R1(C),XS(a)
      • R(g);OGATE::QAB(H)+P(G),XR(g)
      • R(g);S_CUTB(f)::S(I),XS(e)
      • R(g);N_GUARD::R1(F),XP(d)
      • B(f);N_GUARD::S(I),XS(e)
      • B(f);S_CUTR(g)::R1(F),XP(d)
      • S(a);N_GUARD::R1(C)
      • P(b);N_GUARD::P(A)
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