MESON Chess Problem Database

Problem Display
PID: 120663 (7B/1r6/2Ppk1P1/3N1pP1/3Q3P/1p1P1N2/3Pp2P/2n1R1KB w - - 0 1)

Lyris, Basil D

Slovensky Dennik, 1992

7B/1r6/2Ppk1P1/3N1pP1/3Q3P/1p1P1N2/3Pp2P/2n1R1KB

#2

14 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Sf4#
    • 1...Sa2
      • 2.Rxe2#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qe3#
        • 2.Qf6#
      • 1...Sxd3
        • 2.Qf6#
      • 1...f4
        • 2.Qf6#
        • 2.Qe4#
      • 1...d5
        • 2.Qe5#
        • 2.Qf6#
      • 1...Rb4
        • 2.Qf6#
      • 1...Rb5
        • 2.Qf6#
      • 1...Rf7
        • 2.Qe3#
      • 1...Ke7!
    • 1.Sc7+?
      • 1...Ke7
        • 2.Qf6#
      • 1...Rxc7!
    • 1.Bf6?
      • threat
        • 2.Sf4#
      • 1...f4
        • 2.Qe4#
      • 1...Sxd3!
    • 1.Qb6?
      • threat
        • 2.Sd4#
      • 1...Kxd5
        • 2.Sd4#
      • 1...Rg7!
    • 1.Qf4?
      • threat
        • 2.Sd4#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Rb4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Sd4#
      • 1...Kxd5
        • 2.Sd4#
      • 1...Rb4
        • 2.Qf7#
      • 1...Rg7
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(g);SBLOCK::S(J)
    • S(a);N_GUARD::R(A),XP(b)
    • P(d);N_GUARD::QAR2(H)
  • Tries
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XP(F)::QAR1(H)
        • R(g);::QAR1(H)
        • R(g);::QAR(H)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(J);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(H)
      • Refutation
        • R(g);XS(J)
    • Try
      • B(N);
      • Threat
        • S(J)
      • Vars
        • P(d);N_GUARD::QAR2(H)
      • Refutation
        • S(a);XP(F)
    • Try
      • Q(H);
      • Threat
        • S(G)
      • Vars
        • K(f);N_SPINP(b),S_FLIGHT,XS(J)::B(C)+S(G)
      • Refutation
        • R(g);
    • Try
      • Q(H);
      • Threat
        • S(G)
      • Vars
        • K(f);N_SPINP(b),OGATEB,S_FLIGHT,XS(J)::QAB1(H)
      • Refutation
        • R(g);
  • Actual
    • Q(H);
    • Threat
      • S(G)
    • Vars
      • K(f);N_SPINP(b),S_FLIGHT,XS(J)::B(C)+S(G)
      • R(g);OGATE::QAB1(H)
      • R(g);::S(J)
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