MESON Chess Problem Database

Problem Display
PID: 166313 (1R2BK1Q/B3PP2/p2p2R1/3k4/p2N1P2/3pP3/1n3N2/b1rq1n1b w - - 0 1)

Jorgensen, Walther Martinus Johannes

Larsen, Lars Aksglade (= Aksglade, Lars)

2nd Prize, De Waarheid, 1971

1R2BK1Q/B3PP2/p2p2R1/3k4/p2N1P2/3pP3/1n3N2/b1rq1n1b

#2

12 + 11

15593 170 Skakopgaver (Jorgensen) 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Rg5#
    • 1...Sc4
      • 2.Bc6#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Sc4
        • 2.Sb4#
      • 1...dxc2!
    • 1.Se2?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Rc4
        • 2.Qh5#
      • 1...Sc4
        • 2.Qxh1#
      • 1...dxe2!
    • 1.Sb5?
      • threat
        • 2.Qd4#
      • 1...Rc4
        • 2.Rxd6#
      • 1...Sc4
        • 2.Sc7#
      • 1...Kc4!
    • 1.Sf5?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Rc4
        • 2.Rxd6#
      • 1...Sc4!
    • 1.Sc6?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Sc4
        • 2.Sb4#
      • 1...Rc4!
    • 1.Se6?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Sc4
        • 2.Sc7#
      • 1...Rc4!
    • 1.Rxd6+?
      • 1...Kxd6
        • 2.Qe5#
      • 1...Kc4!
    • 1.Qxh1+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Qf3!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Rc4
        • 2.Qh5#
      • 1...Sc4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R(E)
    • S(f);SBLOCK,S_CUTR(b)::B(J)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • K(i);S_FLIGHT::QAR1(L)
        • S(f);SBLOCK::S(C)
      • Refutation
        • P(g);XS(C)
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • K(i);S_FLIGHT::QAR1(L)
        • R(b);SBLOCK::QAR(L)
        • S(f);SBLOCK::QAB(L),XB(e)
      • Refutation
        • P(g);XS(C)
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • R(b);SBLOCK::R1(E),XP(k)
        • S(f);SBLOCK,S_CUTR(b)::S(C)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • K(i);S_FLIGHT::QAR1(L)
        • R(b);SBLOCK::R1(E),XP(k)
      • Refutation
        • S(f);
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • K(i);S_FLIGHT::QAR1(L)
        • S(f);SBLOCK::S(C)
      • Refutation
        • R(b);
    • Try
      • S(C);
      • Threat
        • QAR1(L)
      • Vars
        • K(i);S_FLIGHT::QAR1(L)
        • S(f);SBLOCK,S_CUTR(b)::S(C)
      • Refutation
        • R(b);
    • Try
      • R(E);CHECK,XP(k)
      • Vars
        • K(i);P-FLIGHT,XR(E)::QAB1(L)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • Q(L);CHECK,XB(e)
      • Vars
        • K(i);OGATE,S_FLIGHT::QAR2(L)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • S(C);
    • Threat
      • QAR1(L)
    • Vars
      • K(i);S_FLIGHT::QAR1(L)
      • R(b);SBLOCK::QAR(L)
      • S(f);SBLOCK::P(B)
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