MESON Chess Problem Database

Problem Display
PID: 247882 (8/4K3/Bp2RN2/3p4/2nkp2N/7r/1P2RP2/2Qr2B1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd Prize, Blikeng-80 JT, 1993-1994

8/4K3/Bp2RN2/3p4/2nkp2N/7r/1P2RP2/2Qr2B1

#2

10 + 7

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qxd1#
    • 1...Sxb2
      • 2.Sf5#
    • 1...Sd2
      • 2.Sf5#
    • 1...Sa3
      • 2.Sf5#
    • 1...Se3
      • 2.Qc3#
    • 1...Sa5
      • 2.Sf5#
    • 1...Se5
      • 2.Sf5#
  • Tries
    • 1.Sf5+?
      • 1...Kd3
        • 2.Qxd1#
        • 2.Qc2#
      • 1...Kc5!
    • 1.R2xe4+?
      • 1...Kd3
        • 2.Qxd1#
        • 2.Qc3#
      • 1...dxe4
        • 2.Qxc4#
      • 1...Kc5!
    • 1.Qc3+?
      • 1...Kc5
        • 2.Sd7#
        • 2.b4#
      • 1...Rxc3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Rxd5#
      • 1...Kd3
        • 2.Qxd1#
      • 1...Kc5
        • 2.Qxc4#
      • 1...Kxe5
        • 2.f4#
      • 1...Sxe5
        • 2.Sf5#
      • 1...Se3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(d);P-FLIGHT,P_SPINS(c)::QAR2(A),XR(a)
    • S(c);XP(C)::S(F)
    • S(c);::S(F)
    • S(c);S_CUTR(b)::QAB1(A)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);P_SPINS(c),S_FLIGHT
    • Try
      • R(D);CHECK,XP(e)
      • Vars
        • P(f);XR(D)::QAR1(A),XS(c)
      • Refutation
        • K(d);P_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • R(b);XQ(A)
  • Actual
    • R(H);
    • Threat
      • R1(H),XP(f)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(c)::QAR2(A),XR(a)
      • K(d);P_SPINP(f),P_SPINS(c),S_FLIGHT::QAR1(A),XS(c)
      • K(d);P_SPINP(e),S_FLIGHT,XR(H)::P(E)
      • S(c);SBLOCK,XR(H)::S(F)
      • S(c);S_CUTR(b)::QAB1(A)
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