MESON Chess Problem Database

Problem Display
PID: 141438 (3KB1nQ/4p1q1/4pB2/p4p2/pk6/3R4/2Rp4/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Deutsche Schachzeitung, 1987

3KB1nQ/4p1q1/4pB2/p4p2/pk6/3R4/2Rp4/8

#2

6 + 9

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1?
      • threat
        • 2.Qb7#
        • 2.Qb1#
      • 1...Qxf6
        • 2.Qb7#
      • 1...exf6
        • 2.Qb1#
      • 1...d1Q
        • 2.Qb7#
      • 1...d1S
        • 2.Qb7#
      • 1...d1B
        • 2.Qb7#
        • 2.Qe1#
      • 1...d1R
        • 2.Qb7#
      • 1...Qg2
        • 2.Qb1#
      • 1...Qg1!
    • 1.Qh2?
      • threat
        • 2.Qf4#
        • 2.Qb8#
        • 2.Qxd2#
      • 1...Qxf6
        • 2.Qb8#
      • 1...Sxf6
        • 2.Qb8#
        • 2.Qxd2#
      • 1...exf6
        • 2.Qf4#
        • 2.Qd6#
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qf4#
        • 2.Qb8#
      • 1...d1S
        • 2.Qf4#
        • 2.Qb8#
      • 1...d1B
        • 2.Qf4#
        • 2.Qb8#
        • 2.Qd2#
      • 1...d1R
        • 2.Qf4#
        • 2.Qb8#
      • 1...Qh6
        • 2.Qb8#
      • 1...Qg1
        • 2.Qxd2#
      • 1...Qg3
        • 2.Qxd2#
      • 1...Qg4
        • 2.Qb8#
        • 2.Qxd2#
      • 1...Qg5
        • 2.Qb8#
      • 1...f4
        • 2.Qxf4#
        • 2.Qxd2#
      • 1...e5
        • 2.Qxd2#
      • 1...Qg2!
    • 1.Qh4+?
      • 1...f4
        • 2.Qxf4#
      • 1...Qg4!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Ba3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qxb2
        • 2.Qxb2#
      • 1...Qc3
        • 2.Qxc3#
      • 1...a3
        • 2.Bxa3#

This anticipates 240711(1994)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);XB(C)::QAR(F)
        • P(g);XB(C)::QAR(F)
        • P(a);P_PINR(B)::QAR(F)
        • P(a);::QAR(F)
        • Q(h);::QAR(F)
      • Refutation
        • Q(h);
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • Q(h);XB(C)::QAR(F)
        • Q(h);::QAR(F)
        • Q(h);::QAB(F),XP(a)
        • P(f);::QAB(F),XP(a)
      • Refutation
        • Q(h);
    • Try
      • Q(F);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAR(F),XP(e)
      • Refutation
        • Q(h);P_SPINQ(h)
  • Actual
    • B(C);
    • Threat
      • B(C)
    • Vars
      • Q(h);CHECK,OGATE::QAR2(F),XQ(h)
      • Q(h);OGATE,XB(C)::QAR2(F),XQ(h)
      • Q(h);OGATE::QAB1(F),XQ(h)
      • P(b);::B(C),XP(b)
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