MESON Chess Problem Database

Problem Display
PID: 240711 (3KB2Q/4p1q1/5Bn1/p4p2/pk6/3R4/2R5/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1994

3KB2Q/4p1q1/5Bn1/p4p2/pk6/3R4/2R5/8

#2

6 + 7

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Bd4?
      • threat
        • 2.Bc5#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qe5!
    • 1.Rd4+?
      • 1...Ka3
        • 2.Qh3#
      • 1...Kb3!
    • 1.Qh1?
      • threat
        • 2.Qb7#
        • 2.Qb1#
        • 2.Qe1#
      • 1...exf6
        • 2.Qb1#
        • 2.Qe1#
      • 1...Qh6
        • 2.Qb7#
        • 2.Qb1#
      • 1...Qf7
        • 2.Qb7#
        • 2.Qe1#
      • 1...Qg8
        • 2.Qb7#
        • 2.Qe1#
      • 1...e5
        • 2.Qb1#
        • 2.Qe1#
      • 1...e6
        • 2.Qb1#
        • 2.Qe1#
      • 1...Qxf6!
    • 1.Qh2?
      • threat
        • 2.Qb8#
        • 2.Qd2#
      • 1...exf6
        • 2.Qd6#
        • 2.Qd2#
      • 1...Qh6
        • 2.Qb8#
      • 1...Sf4
        • 2.Qxf4#
        • 2.Qd2#
      • 1...Se5
        • 2.Qd2#
      • 1...f4
        • 2.Qd2#
      • 1...e5
        • 2.Qd2#
      • 1...e6
        • 2.Qd6#
        • 2.Qd2#
      • 1...Qxf6!
    • 1.Qh4+?
      • 1...Sf4
        • 2.Qe1#
        • 2.Qxf4#
      • 1...f4
        • 2.Qe1#
      • 1...Sxh4!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Ba3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qxb2
        • 2.Qxb2#
      • 1...Qc3
        • 2.Qxc3#
      • 1...a3
        • 2.Bxa3#

Anticipated by 141438(1987)

FEATURES

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