MESON Chess Problem Database

Problem Display
PID: 221316 (2b2Q1B/K7/1p2p3/1P1k2pB/1p1NN3/1P3p2/2p1q3/4R2r w - - 0 1)

Ringqvist, Bengt

Tidskrift for Schack, 1977

2b2Q1B/K7/1p2p3/1P1k2pB/1p1NN3/1P3p2/2p1q3/4R2r

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qxf3#
    • 1...Qd1
      • 2.Qd6#
    • 1...Qf1
      • 2.Qd6#
    • 1...Qd3
      • 2.Qd6#
    • 1...Qc4
      • 2.Qd6#
    • 1...Qxb5
      • 2.Qd6#
    • 1...Qd2
      • 2.Qd6#
    • 1...Qf2
      • 2.Qd6#
    • 1...Qg2
      • 2.Qd6#
  • Tries
    • 1.Bxf3?
      • threat
        • 2.Sc3#
        • 2.Qd6#
      • 1...Qxf3
        • 2.Qd6#
      • 1...Qxe4
        • 2.Bxe4#
      • 1...Rxh8
        • 2.Qd6#
      • 1...e5
        • 2.Qd6#
      • 1...Qh2
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sxg5#
      • 1...Rh7+!
    • 1.Qf5+?
      • 1...e5
        • 2.Qxe5#
      • 1...exf5!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qxf3#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Qxb5
        • 2.Qd6#
      • 1...Qxe4
        • 2.Sc7#
      • 1...Bxe6
        • 2.Qa8#
      • 1...Qh2
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • K(f);OGATEB,P_SPINQ(c),S_FLIGHT,XS(D)::QAB1(H),XP(d)
    • Q(c);::QAR1(H)
    • Q(c);XP(E)::QAR1(H)
  • Tries
    • Try
      • B(F);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XB(F)::QAR1(H)
        • Q(c);OGATE,P_SPINQ(c),XS(D)::B(F),XQ(c)
        • R(a);XB(I)::QAR1(H)
        • P(i);::QAR1(H)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(H);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAR1(H),XP(i)
      • Refutation
        • P(i);XQ(H)
  • Actual
    • S(C);XP(i)
    • Threat
      • QAR2(H)
    • Vars
      • K(f);OGATEB,P_SPINQ(c),S_FLIGHT,XS(D)::QAB1(H),XP(d)
      • K(f);OGATEB,S_FLIGHT,XS(C)::QAB1(H)
      • Q(c);XP(E)::QAR1(H)
      • Q(c);XS(D)::S(C)
      • B(j);OGATE,SBLOCK,XS(C)::QAB(H)
      • Q(c);::S(D)
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