MESON Chess Problem Database

Problem Display
PID: 4666 (8/1R6/5P2/3n4/2N3PK/2P2k1N/Q1P2p2/5B2 w - - 0 1)

Stahl, Karl

3rd Prize, Buffalo Times, 1886

8/1R6/5P2/3n4/2N3PK/2P2k1N/Q1P2p2/5B2

#2

10 + 3

15 British Chess Magazine 1886
58 Tijdschrift vd NSB 1896
3360 Simple Two-move Themes 1924
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bg2#
    • 1...Se3
      • 2.Sd2#
    • 1...Sf4
      • 2.Sg5#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxd5#
      • 1...Ke4
        • 2.Bg2#
      • 1...Sxc3
        • 2.Qf5#
      • 1...Sxf6
        • 2.Qf5#
      • 1...Sb4
        • 2.Qf5#
      • 1...Se3
        • 2.Sd2#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sb6
        • 2.Qf5#
      • 1...Sc7
        • 2.Qf5#
      • 1...Se7!
    • 1.Qa7?
      • threat
        • 2.Sd2#
      • 1...Ke4
        • 2.Bg2#
      • 1...Sb6!
  • Keys
    • 1.Qa8!
      • 1...Ke4
        • 2.Bg2#
      • 1...Sxc3
        • 2.Rb3#
      • 1...Sxf6
        • 2.Rf7#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Se3
        • 2.Sd2#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Se7
        • 2.Rxe7#

This anticipates 229637(1947)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(A)
    • S(c);SBLOCK::S(F)
    • S(c);SBLOCK::S(E)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B),XS(c)
      • Vars
        • K(b);S_FLIGHT::B(A)
        • S(c);OGATE,XP(D)::QAR2(B)
        • S(c);OGATE,XP(I)::QAR2(B)
        • S(c);OGATE::QAR2(B)
        • S(c);SBLOCK::S(F)
        • S(c);SBLOCK::S(E)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • S(c);
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • S(c);OGATEB,XP(D)::QAB(B)+R(J)
      • S(c);OGATEB,XP(I)::QAB(B)+R(J)
      • S(c);OGATEB::QAB(B)+R(J),XS(c)
      • S(c);SBLOCK::S(F)
      • S(c);SBLOCK::S(E)
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