MESON Chess Problem Database

Problem Display
PID: 188015 (3B1N2/4nPRK/pr3k1n/r4p2/bb3Pp1/p1NR2P1/P7/8 w - - 0 1)

Dawson, Thomas Rayner

The Observer, 1936

(First published on Sun Sep 27 1936)

3B1N2/4nPRK/pr3k1n/r4p2/bb3Pp1/p1NR2P1/P7/8

#2

10 + 11

15256 TRD Scrapbook 2014
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sxd5#
    • 1...Bb5
      • 2.Sd5#
    • 1...Be8
      • 2.fxe8S#
    • 1...Bc5
      • 2.Sd5#
    • 1...Sxf7
      • 2.Rg6#
    • 1...Sg8
      • 2.fxg8S#
  • Tries
    • 1.Sd7+?
      • 1...Ke6
        • 2.f8S#
      • 1...Bxd7!
  • Keys
    • 1.Re3!
      • 1...Bxc3
        • 2.Bxe7#
      • 1...Sxf7
        • 2.Rg6#
      • 1...Rab5
        • 2.Sd7#
      • 1...Rc5
        • 2.Bxe7#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Re5
        • 2.fxe5#
      • 1...Rbb5
        • 2.Sd7#
        • 2.Re6#
      • 1...Rc6
        • 2.Sd7#
      • 1...Rd6
        • 2.Bxe7#
      • 1...Re6
        • 2.Rxe6#
      • 1...Rb7
        • 2.Re6#
      • 1...Rb8
        • 2.Re6#
      • 1...Bd1
        • 2.Sd7#
      • 1...Bc2
        • 2.Sd7#
      • 1...Bb3
        • 2.Sd7#
      • 1...Bb5
        • 2.Sd5#
      • 1...Bc6
        • 2.Re6#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Be8
        • 2.fxe8S#
      • 1...Bc5
        • 2.Sd5#
      • 1...Bd6
        • 2.Re6#
      • 1...Sg8
        • 2.fxg8S#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD::S(B),XR(e)
    • B(b);S_CUTR(e)::S(B)
    • B(b);OGATE::PXB(b)=S
    • B(c);S_CUTR(e)::S(B)
    • S(j);SBLOCK,XP(F)::R1(G)
    • S(j);OGATE::PXS(j)=S
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(i);N_SPINS(k),P-FLIGHT::P=S
      • Refutation
        • B(b);XS(J)
  • Actual
    • R(C);
    • Vars
      • B(c);N_GUARD,XS(B)::B(I),XS(k)
      • S(j);SBLOCK,XP(F)::R1(G)
      • R(e);S_CUTB(b)::S(J)
      • R(e);S_CUTB(c)::B(I),XS(k)
      • R(e);N_GUARD::S(B),XR(e)
      • R(e);OGATE::P(E),XR(e)
      • R(h);S_CUTB(b)::S(J)
      • R(h);S_CUTB(c)::B(I),XS(k)
      • R(h);N_GUARD::R1(C),XR(h)
      • R(h);N_GUARD::R1(C)
      • B(b);N_GUARD::S(J)
      • B(b);S_CUTR(e)::S(B)
      • B(b);S_CUTR(h)::R1(C)
      • B(b);N_GUARD::S(J),XB(b)
      • B(b);OGATE::PXB(b)=S
      • B(c);S_CUTR(e)::S(B)
      • B(c);S_CUTR(h)::R1(C)
      • S(j);OGATE::PXS(j)=S
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