MESON Chess Problem Database

Problem Display
PID: 262066 (6K1/1nn4B/2Q2p2/1p1NkN1p/5p2/3P4/4q3/4R1b1 w - - 0 1)

Lipton, Michael

1st Comm., Sunday Times, 1966

6K1/1nn4B/2Q2p2/1p1NkN1p/5p2/3P4/4q3/4R1b1

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rxe4#
    • 1...Bh2
      • 2.Rxe2#
    • 1...Sa5
      • 2.Qd6#
    • 1...Sc5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Sd7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...f3!
    • 1.Sxc7?
      • threat
        • 2.Qd5#
        • 2.Qe8#
        • 2.Qe6#
      • 1...Bc5
        • 2.Qd5#
        • 2.Qe6#
      • 1...Sc5
        • 2.Qd5#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qd5#
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd5#
        • 2.Qd6#
      • 1...f3!
    • 1.Qxc7+?
      • 1...Ke6
        • 2.Sxf4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxd5!
  • Keys
    • 1.Sde3!
      • threat
        • 2.Qe4#
        • 2.d4#
      • 1...Qg4+
        • 2.Sxg4#
      • 1...Qa2+
        • 2.Sc4#
      • 1...Qg2+
        • 2.Sg4#
      • 1...Qxd3
        • 2.Sc4#
        • 2.Sg4#
      • 1...Qxe3
        • 2.d4#
      • 1...Bxe3
        • 2.Qe4#
      • 1...fxe3
        • 2.Qe4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...f3
        • 2.Qe4#
      • 1...Qd1
        • 2.Sc4#
        • 2.Sg4#
        • 2.Qe4#
      • 1...Qf3
        • 2.Sc4#
        • 2.Sg4#
        • 2.d4#
      • 1...Qb2
        • 2.Sc4#
        • 2.Sg4#
        • 2.Qe4#
      • 1...Qd2
        • 2.Sc4#
        • 2.Sg4#
        • 2.Qe4#
      • 1...Sc5
        • 2.Qd6#
        • 2.d4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qe4#
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • Q(b);OGATE::R1(A),XQ(b)
    • B(a);N_GUARD::R(A),XQ(b)
    • S(h);N_GUARD::QAB1(E)
    • S(h);N_GUARD::QAB1(E),XS(h)
  • Tries
    • Try
      • S(C);XP(g)
      • Threat
        • S(C)
      • Vars
        • S(h);N_GUARD::QAB1(E),XS(h)
        • S(h);N_GUARD::QAB1(E)
      • Refutation
        • P(c);
    • Try
      • S(C);XS(i)
      • Threat
        • DUALS(3)
      • Refutation
        • P(c);
    • Try
      • Q(E);CHECK,XS(i)
      • Vars
        • K(e);P-FLIGHT,S_CUTS(h)::S(C),XP(c)
        • S(h);N_GUARD,P_SPINS(h)::QAB1(E),XS(h)
      • Refutation
        • K(e);N_SPINQ(b),P-FLIGHT,XS(C)
  • Actual
    • S(C);N_PINQ(b)
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);CHECK::R(A)+S(C),DCHECK,XQ(b)
      • Q(b);CHECK::R(A)+S(C),DCHECK
      • Q(b);P_SPINQ(b),XS(C)::P(B)
      • B(a);XS(C)::QAR1(E)
      • P(c);XS(C)::QAR1(E)
      • S(h);N_GUARD::QAB1(E),XS(h)
      • P(c);::QAR1(E)
      • S(i);N_GUARD::QAR1(E),XS(i)
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