MESON Chess Problem Database

Problem Display
PID: 125 (B1N5/K2Npn2/bR2p3/B7/P1k1r3/1p1R3Q/2r5/n5b1 w - - 0 1)

Larsen, Karl Adolf Koefoed

HM., De Problemist, 1930

B1N5/K2Npn2/bR2p3/B7/P1k1r3/1p1R3Q/2r5/n5b1

#2

9 + 10

20 De Problemist 1931
4035 Aarsskrift for DSK 1933
2048 Tuxens skakopgaver (Leif C Schmidt) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Rb4#
      • 2.Rc6#
    • 1...Rd4
      • 2.Rb4#
    • 1...Bh2
      • 2.Rb4#
      • 2.Rc6#
    • 1...Bxb6+
      • 2.Scxb6#
    • 1...e5
      • 2.Bd5#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Qd3#
      • 1...Bxb6+
        • 2.Scxb6#
      • 1...Rd2
        • 2.Qc3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Re3
        • 2.Rc6#
      • 1...Rd4
        • 2.Rb4#
      • 1...Se5
        • 2.Qxe6#
      • 1...Be3!
    • 1.Rc3+?
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Kd4!
    • 1.Qxe6+?
      • 1...Kxd3
        • 2.Qxe4#
      • 1...Rxe6!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qd3#
      • 1...Bxb6+
        • 2.Scxb6#
      • 1...Rxd2
        • 2.Qc3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Re3
        • 2.Rc6#
      • 1...Rd4
        • 2.Rb4#
      • 1...Be3
        • 2.Qf1#
      • 1...Se5
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(f);N_PINR(E)::R1(E)
    • B(b);CHECK,XR(E)::S(I),XB(b)
    • P(h);N_GUARD::B(H)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAB1(B)
      • Vars
        • B(b);CHECK,XR(E)::S(I),XB(b)
        • R(c);N_GUARD::QAR1(B)
        • R(c);N_GUARD::QAR1(B),XR(c)
        • R(f);N_PINR(E)::R(E)
        • R(f);N_PINR(E)::R1(E)
        • S(j);S_CUTR(f)::QAB(B),XP(h)
      • Refutation
        • B(b);
    • Try
      • R(A);CHECK
      • Vars
        • R(c);OGATE,XR(A)::QAR1(B),XR(c)
      • Refutation
        • K(e);N_PINR(E),P-FLIGHT
    • Try
      • Q(B);CHECK,XP(h)
      • Vars
        • K(e);S_FLIGHT,XR(A)::QAB1(B),XR(f)
      • Refutation
        • R(f);XQ(B)
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • B(b);CHECK,XR(E)::S(I),XB(b)
      • R(c);N_GUARD,XR(A)::QAR1(B)
      • R(c);N_GUARD::QAR1(B),XR(c)
      • R(f);N_PINR(E)::R(E)
      • R(f);N_PINR(E)::R1(E)
      • B(b);S_CUTR(f)::QAB(B)
      • S(j);S_CUTR(f)::QAB(B),XP(h)
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