MESON Chess Problem Database

Problem Display
PID: 239252 (1B2b3/3R4/P3kP1N/6p1/1KR3r1/2pP1r1B/Q7/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Sachove umeni (Ceskoslovensky sach), 1962

1B2b3/3R4/P3kP1N/6p1/1KR3r1/2pP1r1B/Q7/8

#2

10 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6
      • 2.Rcd4#
    • 1...Bxd7
      • 2.Rf4#
  • Tries
    • 1.Bxg4+?
      • 1...Kxf6
        • 2.Rc6#
      • 1...Rf5!
    • 1.Re4+?
      • 1...Kxf6
        • 2.Qe6#
      • 1...Kxd7!
    • 1.Rdd4?
      • threat
        • 2.Rc6#
      • 1...Rxf6
        • 2.Qe2#
      • 1...Bc6
        • 2.Rxc6#
      • 1...Kxf6!
    • 1.Re7+?
      • 1...Kd5
        • 2.Re5#
      • 1...Kxf6!
    • 1.d4?
      • threat
        • 2.Rd6#
      • 1...Kxf6
        • 2.Rc6#
      • 1...Rxf6
        • 2.Rcc7#
      • 1...Bxd7
        • 2.Rc6#
      • 1...Kxd7!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Rd6#
      • 1...Kxf6
        • 2.Qb6#
      • 1...Kxd7
        • 2.Qd5#
      • 1...Rxd3
        • 2.Qf5#
      • 1...Rxf6
        • 2.Qd5#
      • 1...Bxd7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(G)::QAB(A)+R(E)
    • B(f);SBLOCK,XR(I)::QAB(A)+R(E)
  • Tries
    • Try
      • B(C);CHECK,N_SPINR(E),XR(c)
      • Vars
        • K(e);P-FLIGHT,XP(G)::R(E)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(E);CHECK
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,XP(G)::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT,XR(I)
    • Try
      • R(I);N_SPINR(E)
      • Threat
        • QAB(A)+R(E),DCHECK
      • Vars
        • R(b);N_GUARD,SBLOCK,XP(G)::QAR(A)
        • B(f);::QAB(A)+R(E),DCHECK,XB(f)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT,XP(G)
    • Try
      • R(I);CHECK
      • Vars
        • K(e);N_SPINR(c),OGATE,S_FLIGHT::R1(I)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT,XP(G)
    • Try
      • P(B);N_SPINR(E)
      • Threat
        • R1(I)
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,XP(G)::R(E)
        • R(b);SBLOCK,XP(G)::QAB(A)+R(E)
        • B(f);SBLOCK,XR(I)::QAB(A)+R(E),DCHECK
      • Refutation
        • K(e);S_FLIGHT,XR(I)
  • Actual
    • Q(A);
    • Threat
      • R1(I)
    • Vars
      • K(e);N_SPINR(c),P-FLIGHT,XP(G)::QAR(A)
      • K(e);S_FLIGHT,XR(I)::QAR2(A)
      • R(b);N_GUARD,XP(B)::QAB1(A)
      • R(b);SBLOCK,XP(G)::QAB1(A)
      • B(f);SBLOCK,XR(I)::QAR1(A)
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