MESON Chess Problem Database

Problem Display
PID: 241211 (b3n3/p3R3/2P2p2/Q1K2kpP/1pNP2p1/1r2R1P1/2q1Pp2/1B1rb3 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Sachsische Zeitung, 1997

b3n3/p3R3/2P2p2/Q1K2kpP/1pNP2p1/1r2R1P1/2q1Pp2/1B1rb3

#2

11 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
    • 1...Rxd4
      • 2.Kxd4#
    • 1...Rc3
      • 2.Kxb4#
    • 1...Bxc6
      • 2.Kxc6#
    • 1...Sd6
      • 2.Kxd6#
    • 1...Sg7
      • 2.Kd6#
    • 1...a6
      • 2.Kb6#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Se3#
      • 1...Rxc3
        • 2.Kxb4#
      • 1...Rd3
        • 2.e4#
      • 1...Bd2
        • 2.Bxc2#
      • 1...f1S!
  • Keys
    • 1.Rd3!
      • threat
        • 2.e4#
      • 1...Qxc4+
        • 2.Kxc4#
      • 1...Qxd3
        • 2.Se3#
      • 1...Qxe2
        • 2.Rf3#
      • 1...Bxc6
        • 2.Kxc6#
      • 1...Sd6
        • 2.Kxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_PINS(E),OGATE::B(A),XQ(c)
    • R(a);XP(F)::QAR(G)+K(H),XR(a)
    • R(e);::QAR(G)+K(H),XP(f)
    • B(l);XP(J)::QAR(G)+K(H),XB(l)
    • S(m);::QAR(G)+K(H),XS(m)
    • S(m);::QAR(G)+K(H)
    • P(k);::QAR(G)+K(H)
  • Tries
    • Try
      • R(C);N_SPINS(E)
      • Threat
        • S(E)
      • Vars
        • R(e);P_PINS(E),XR(C)::QAR(G)+K(H),XP(f)
        • R(a);N_SPINQ(c),S_CUTQ(c)::P(B)
        • B(b);S_CUTR(a)::B(A),XQ(c)
      • Refutation
        • P(d);
  • Actual
    • R(C);N_PINQ(c)
    • Threat
      • P(B)
    • Vars
      • Q(c);CHECK,XS(E)::QAR(G)+K(H),XQ(c)
      • Q(c);N_PINS(E),P_SPINQ(c),XR(C)::S(E)
      • Q(c);N_PINS(E),XP(B)::B(A)+R(C),DCHECK
      • B(l);XP(J)::QAR(G)+K(H),XB(l)
      • S(m);::QAR(G)+K(H),XS(m)
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