MESON Chess Problem Database

Problem Display
PID: 240293 (8/8/1N3P2/1K4Qp/3kp2r/bR1n4/p2R4/1B6 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Problem-Forum, 2007

8/8/1N3P2/1K4Qp/3kp2r/bR1n4/p2R4/1B6

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qc5#
    • 1...Bb2
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...e3
      • 2.Qd5#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rc4#
      • 1...Sb2
        • 2.Qd5#
      • 1...Se5
        • 2.Qe3#
      • 1...Rf4!
    • 1.Rb4+?
      • 1...Kc3
        • 2.Sa4#
        • 2.Sd5#
        • 2.Rc2#
      • 1...Bxb4!
    • 1.Qe5+?
      • 1...Ke3
        • 2.Rbxd3#
      • 1...Kxe5!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qd5#
      • 1...Sb4
        • 2.Qc5#
      • 1...Sf4
        • 2.Rxe4#
      • 1...Se5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAB1(E)
    • B(b);N_GUARD::QAB1(E),XB(b)
    • P(e);SBLOCK::QAR1(E)
  • Tries
    • Try
      • R(B);N_PINS(c)
      • Threat
        • R1(B)
      • Vars
        • S(c);::QAR1(E)
        • S(c);SBLOCK::QAB1(E)
      • Refutation
        • R(f);
    • Try
      • R(C);CHECK
      • Refutation
        • B(b);XR(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::R1(C),XS(c)
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT,XQ(E)
  • Actual
    • R(B);N_PINS(c)
    • Threat
      • QAR1(E)
    • Vars
      • S(c);N_GUARD,S_CUTB(b)::QAB1(E)
      • S(c);S_CUTR(f)::R1(B),XP(e)
      • S(c);SBLOCK::QAB1(E)
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