MESON Chess Problem Database

Problem Display
PID: 200649 (1q6/1b6/5RQ1/1PpkP2R/3N4/1P3n2/4N2b/B2K4 w - - 0 1)

Hebelt, Vaclav

Stella Polaris, 1967

1q6/1b6/5RQ1/1PpkP2R/3N4/1P3n2/4N2b/B2K4

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Rd6#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qa7
      • 2.Rd6#
    • 1...Qa8
      • 2.Rd6#
    • 1...Qc8
      • 2.Rd6#
    • 1...Qe8
      • 2.Rd6#
    • 1...Qg8
      • 2.Rd6#
    • 1...Qh8
      • 2.Rd6#
    • 1...Bg1
      • 2.Sf4#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bxe5
      • 2.Sf4#
    • 1...Sxd4
      • 2.Sc3#
    • 1...Sxe5
      • 2.Qg2#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Se3#
        • 2.Sc3#
      • 1...Bg1
        • 2.Sc3#
        • 2.Sf4#
      • 1...Bf4
        • 2.Sc3#
        • 2.Sxf4#
      • 1...Sg5
        • 2.Se3#
        • 2.Qd3#
      • 1...c4!
    • 1.Sxf3?
      • threat
        • 2.Sc3#
        • 2.Qd3#
      • 1...Bg1
        • 2.Sc3#
        • 2.Sf4#
      • 1...c4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc3#
      • 1...Qxe5
        • 2.Sc7#
      • 1...Bxe5
        • 2.S6f4#
      • 1...Sxe5
        • 2.Qd3#
      • 1...Sg5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),XP(G)::R1(I)
    • Q(f);N_GUARD::R1(I),XQ(f)
    • Q(f);N_GUARD::R1(I)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);N_GUARD,P_SPINB(a),XP(G)::S(C)
    • S(b);SBLOCK,XS(E)::S(C)
    • S(b);OGATEB,P_SPINS(b),XP(G)::QAB(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • S(E);XS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
  • Actual
    • S(E);
    • Threat
      • S(C)
    • Vars
      • Q(f);N_GUARD,P_SPINQ(f),XP(G)::S(E)
      • B(a);N_GUARD,P_SPINB(a),XP(G)::S(E)
      • S(b);N_GUARD,P_SPINS(b),XP(G)::QAR2(J)
      • S(b);N_GUARD::QAR2(J)
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