MESON Chess Problem Database

Problem Display
PID: 193823 (1R4N1/2K2p2/pp1pp1n1/3k1r2/1QNbr3/2p1P3/7q/1B6 w - - 0 1)

Todd, William R

Pittsburgh Gazette-Times, 1916

1R4N1/2K2p2/pp1pp1n1/3k1r2/1QNbr3/2p1P3/7q/1B6

#2

7 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf6#
    • 1...Be5
      • 2.Sxb6#
    • 1...Sf4
      • 2.Se7#
    • 1...Sh4
      • 2.Se7#
    • 1...Se5
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
    • 1...Sf8
      • 2.Se7#
    • 1...Sh8
      • 2.Se7#
  • Tries
    • 1.Sxb6+?
      • 1...Ke5
        • 2.Qxd6#
      • 1...Bxb6+!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Qxd6#
      • 1...Qxe5
        • 2.Ba2#
      • 1...Rexe5
        • 2.Qxd4#
      • 1...Rfxe5
        • 2.Sf6#
      • 1...Bxe5
        • 2.Bxe4#
      • 1...Sxe5
        • 2.Se7#
      • 1...dxe5
        • 2.Rd8#
      • 1...Bc5
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD,S_CUTB(c)::S(G)
    • B(c);N_GUARD,SBLOCK::S(D),XP(h)
    • S(k);N_GUARD::S(G)
    • S(k);N_GUARD::S(G),XS(k)
  • Tries
    • Try
      • S(D);CHECK,XP(h)
      • Vars
        • K(e);P-FLIGHT::QAB1(C),XP(i)
      • Refutation
        • B(c);CHECK,XS(D)
  • Actual
    • S(D);
    • Threat
      • QAR1(C),XP(i)
    • Vars
      • K(e);P-FLIGHT,XS(D)::QAB1(C),XP(i)
      • Q(a);N_GUARD,SBLOCK,XS(D)::B(A)
      • R(d);N_GUARD,XS(D)::QAR1(C),XB(c)
      • R(f);N_GUARD,SBLOCK,XS(D)::S(G)
      • B(c);SBLOCK,XS(D)::B(A),XR(d)
      • S(k);N_GUARD,SBLOCK,XS(D)::S(G)
      • P(i);OGATEB,SBLOCK,XS(D)::R(F)
      • B(c);OGATE,SBLOCK::QAB1(C),XR(d)
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Developed and maintained by Brian Stephenson.
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