MESON Chess Problem Database

Problem Display
PID: 234441 (8/3K2p1/3p4/2pkp3/1p4r1/1P2PP2/3N1N2/2R5 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 1993

8/3K2p1/3p4/2pkp3/1p4r1/1P2PP2/3N1N2/2R5

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.bxc4#
    • 1...Re4
      • 2.fxe4#
  • Tries
    • 1.Sde4?
      • threat
        • 2.Rd1#
      • 1...Rxe4
        • 2.fxe4#
      • 1...Rg1!
    • 1.Sxg4?
      • 1...e4
        • 2.fxe4#
      • 1...g5
        • 2.Sf6#
      • 1...g6
        • 2.Sf6#
      • 1...c4!
    • 1.Rd1?
      • threat
        • 2.Sde4#
      • 1...e4
        • 2.Sc4#
      • 1...Rg1
        • 2.Sf1#
      • 1...Rc4
        • 2.Sxc4#
        • 2.bxc4#
      • 1...Re4
        • 2.Sdxe4#
        • 2.fxe4#
      • 1...Rd4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Rxc4
        • 2.bxc4#
      • 1...e4
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE::P(D),XR(b)
    • R(b);OGATE::P(F),XR(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • R(A)
      • Vars
        • R(b);OGATE,XS(B)::P(F),XR(b)
      • Refutation
        • R(b);
    • Try
      • S(C);XR(b)
      • Vars
        • P(e);OGATE::P(F),XP(e)
        • P(g);N_GUARD::S(C)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Threat
        • R(A)+S(B)
      • Vars
        • P(e);S_CUTR(b)::R(A)+S(B)
        • R(b);N_GUARD::R(A)+S(B)
      • Refutation
        • R(b);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(b);OGATE,XS(B)::P(D),XR(b)
      • P(e);S_CUTR(b)::R(A)
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