MESON Chess Problem Database

Problem Display
PID: 108716 (2B2NQ1/6P1/5p2/Rb1P1PnR/2p1kBp1/4p3/2PPNPK1/4b3 w - - 0 1)

Kruk, Henryk

Canadian Chess Chat, 1981

2B2NQ1/6P1/5p2/Rb1P1PnR/2p1kBp1/4p3/2PPNPK1/4b3

#2

14 + 8

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sh7
      • 2.Qe6#
  • Tries
    • 1.Sc3+?
      • 1...Kxf4
        • 2.Sg6#
      • 1...Kd4!
    • 1.Sg3+?
      • 1...Kxf4
        • 2.Sg6#
      • 1...Kd4!
    • 1.Sd7?
      • threat
        • 2.Sc5#
        • 2.Sxf6#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Se6
        • 2.Sxf6#
        • 2.Qxe6#
      • 1...Sf7
        • 2.Sxf6#
      • 1...Sh7
        • 2.Sc5#
        • 2.Qe6#
      • 1...Bxd7!
    • 1.Sh7?
      • threat
        • 2.Sxf6#
      • 1...Sxh7
        • 2.Qe6#
      • 1...Bd7!
    • 1.Bxg5?
      • threat
        • 2.Qe6#
      • 1...Ke5
        • 2.Qe6#
      • 1...Bd7!
    • 1.dxe3?
      • threat
        • 2.Sg3#
      • 1...Bxf2
        • 2.Sc3#
      • 1...Se6
        • 2.Qxe6#
      • 1...g3
        • 2.Sxg3#
      • 1...Sf7!
    • 1.fxe3?
      • threat
        • 2.Sc3#
      • 1...Bxd2
        • 2.Sg3#
      • 1...c3
        • 2.Sxc3#
      • 1...Bd7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc5#
      • 1...Kxd5
        • 2.Bb7#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Bd7
        • 2.Sg3#
      • 1...Sf7
        • 2.Sc3#

This anticipates 237769(1981)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::QAR2(N)
    • S(g);N_GUARD::QAR2(N),XS(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XB(F)::S(M)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XB(F)::S(M)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(M);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XP(I)::QAB(N)
        • S(g);::S(M),XP(h)
      • Refutation
        • B(f);XS(M)
    • Try
      • S(M);
      • Threat
        • S(M),XP(h)
      • Vars
        • S(g);N_GUARD,XS(M)::QAR2(N)
      • Refutation
        • B(f);
    • Try
      • B(F);XS(g)
      • Threat
        • QAR2(N)
      • Vars
        • K(d);P-FLIGHT::QAR1(N)
      • Refutation
        • B(f);
    • Try
      • P(B);XP(b)
      • Threat
        • S(C)
      • Vars
        • B(a);N_GUARD,XP(D)::S(C)
        • S(g);N_GUARD::QAR2(N),XS(g)
        • P(e);::S(C),XP(e)
      • Refutation
        • S(g);
    • Try
      • P(D);XP(b)
      • Threat
        • S(C)
      • Vars
        • B(a);N_GUARD,XP(B)::S(C)
        • P(c);::S(C),XP(c)
      • Refutation
        • B(f);
  • Actual
    • S(M);
    • Threat
      • S(M)
    • Vars
      • K(d);OGATEB,P_SPINB(f),S_FLIGHT,XP(H)::B(L)
      • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XP(I)::QAB(N)
      • S(g);OGATE,XS(M)::QAR2(N),XS(g)
      • B(f);::S(C)
      • S(g);::S(C)
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