MESON Chess Problem Database

Problem Display
PID: 261300 (2n4K/4PQ1p/2Np1B2/6P1/1n2k1q1/R2N4/Bp1PP1b1/8 w - - 0 1)

Sammelius, Carel Johan Robert

Neue Zurcher Zeitung, 1985

2n4K/4PQ1p/2Np1B2/6P1/1n2k1q1/R2N4/Bp1PP1b1/8

#2

11 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qxh7#
    • 1...Qf3
      • 2.Qe6#
    • 1...Qf5
      • 2.Qc4#
    • 1...Qh5
      • 2.Qe6#
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qg3
      • 2.Qxh7#
    • 1...Qh4
      • 2.Qe6#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sxc6
      • 2.Qd5#
  • Tries
    • 1.Bd5+?
      • 1...Kf5
        • 2.Qxh7#
      • 1...Sxd5!
    • 1.Bc3?
      • threat
        • 2.Sf2#
      • 1...Sxd3
        • 2.Bd5#
      • 1...Qf3
        • 2.Qe6#
      • 1...Qf5
        • 2.Qc4#
      • 1...Qg3
        • 2.Qxh7#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qh4
        • 2.Qe6#
      • 1...Qxe2!
    • 1.Bd4?
      • threat
        • 2.Sf2#
      • 1...Qxe2
        • 2.Qf4#
      • 1...Sxd3
        • 2.Bd5#
        • 2.exd3#
      • 1...Sxc6
        • 2.Qd5#
      • 1...Qf3
        • 2.Qe6#
      • 1...Qg3
        • 2.Qxh7#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qh4
        • 2.Qe6#
      • 1...Qf5!
    • 1.Bg7?
      • threat
        • 2.Sf2#
      • 1...Qxe2
        • 2.Qf4#
      • 1...Sxd3
        • 2.Bd5#
        • 2.exd3#
      • 1...Qf3
        • 2.Qe6#
      • 1...Qf5
        • 2.Qc4#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qh4
        • 2.Qe6#
      • 1...Qg3!
    • 1.e8Q+?
      • 1...Kf5
        • 2.Bd8#
        • 2.Qfe6#
        • 2.Qfd7#
        • 2.Qxh7#
        • 2.Qee6#
      • 1...Qe6
        • 2.Qfxe6#
        • 2.Qxh7#
        • 2.Qexe6#
      • 1...Se7!
    • 1.e8R+?
      • 1...Kf5
        • 2.Bd8#
        • 2.Qxh7#
      • 1...Qe6
        • 2.Qxe6#
        • 2.Qxh7#
      • 1...Se7!
  • Keys
    • 1.Bxb2!
      • threat
        • 2.Sf2#
      • 1...Qxe2
        • 2.Qf4#
      • 1...Sxd3
        • 2.Bd5#
        • 2.exd3#
      • 1...Qf3
        • 2.Qe6#
      • 1...Qf5
        • 2.Qc4#
      • 1...Qg3
        • 2.Qxh7#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qh4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • K(d);S_CUTQ(e),S_FLIGHT::QAB(J),XP(g)
    • Q(e);N_GUARD::QAR2(J)
    • Q(e);SBLOCK::QAR2(J)
    • Q(e);N_GUARD::QAR2(J),XQ(e)
    • Q(e);N_GUARD::QAB(J),XP(g)
    • S(c);N_GUARD::QAB1(J)
    • S(c);N_GUARD::QAB1(J),XS(c)
    • S(c);N_GUARD,XS(G)::QAB1(J)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB(J),XP(g)
      • Refutation
        • S(c);XB(A)
    • Try
      • B(H);
      • Threat
        • S(E)
      • Vars
        • S(c);N_GUARD,XS(E)::B(A)
        • Q(e);N_GUARD::QAR2(J)
        • Q(e);SBLOCK::QAR2(J)
        • Q(e);N_GUARD::QAB(J),XP(g)
        • Q(e);N_GUARD::QAR1(J),XQ(e)
      • Refutation
        • Q(e);XP(C)
    • Try
      • B(H);
      • Threat
        • S(E)
      • Vars
        • Q(e);N_GUARD,XP(C)::QAR1(J)
        • S(c);N_GUARD,XS(G)::QAB1(J)
        • Q(e);N_GUARD::QAR2(J)
        • Q(e);N_GUARD::QAB(J),XP(g)
        • Q(e);N_GUARD::QAR1(J),XQ(e)
      • Refutation
        • Q(e);
    • Try
      • B(H);
      • Threat
        • S(E)
      • Vars
        • Q(e);N_GUARD,XP(C)::QAR1(J)
        • Q(e);N_GUARD::QAR2(J)
        • Q(e);SBLOCK::QAR2(J)
        • Q(e);N_GUARD::QAR1(J),XQ(e)
      • Refutation
        • Q(e);
    • Try
      • P(I);CHECK
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • P(I);CHECK
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • B(H);XP(a)
    • Threat
      • S(E)
    • Vars
      • Q(e);N_GUARD,XP(C)::QAR1(J)
      • Q(e);N_GUARD::QAR2(J)
      • Q(e);SBLOCK::QAR2(J)
      • Q(e);N_GUARD::QAB(J),XP(g)
      • Q(e);N_GUARD::QAR1(J),XQ(e)
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