MESON Chess Problem Database

Problem Display
PID: 98226 (5R2/3R3r/K6p/b4P2/2BPk1N1/5b2/4NQnr/3q4 w - - 0 1)

Lincoln, Robert A

US Problem Bulletin, 1992

5R2/3R3r/K6p/b4P2/2BPk1N1/5b2/4NQnr/3q4

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rxd4#
      • 2.Qxd4#
    • 1...Re7
      • 2.Rxe7#
    • 1...Rh8
      • 2.Re7#
    • 1...Bxe2
      • 2.Sf6#
    • 1...Bxg4
      • 2.Sg3#
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sf4
      • 2.Sg3#
      • 2.Qe3#
    • 1...Sh4
      • 2.Qe3#
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe5#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Bxe2
        • 2.Sf2#
      • 1...Bxg4
        • 2.Bd5#
      • 1...Re7
        • 2.Rxe7#
      • 1...Bc7
        • 2.Sc3#
      • 1...Sf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::R(H),XR(h)
    • R(h);N_GUARD::R(H)
    • B(d);P_PINB(C),XS(A)::S(E)
    • B(d);XS(E)::S(A)
    • S(b);N_GUARD::QAR1(B)
    • S(b);N_GUARD::QAR1(B),XS(b)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);OGATE,XP(D)::R1(H),XQ(a)
      • B(d);P_PINB(C),XS(A)::S(E)
      • B(d);XS(E)::B(C)
      • R(h);N_GUARD::R(H),XR(h)
      • B(f);N_GUARD::S(A)
      • S(b);N_GUARD::QAR1(B),XS(b)
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