MESON Chess Problem Database

Problem Display
PID: 140477 (4R1K1/5p2/1q1P4/1p2BPpb/n5r1/3Nk3/r4pP1/3Q1n2 w - - 0 1)

Rothstein, Louis

Good Companions, 1918

4R1K1/5p2/1q1P4/1p2BPpb/n5r1/3Nk3/r4pP1/3Q1n2

#2

8 + 11

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
    • 1...Qd4
      • 2.Bf4#
    • 1...Rd2
      • 2.Qf3#
    • 1...Rxg2
      • 2.Ba1#
      • 2.Bb2#
      • 2.Bc3#
      • 2.Bf6#
      • 2.Bg7#
      • 2.Bh8#
    • 1...Rg3
      • 2.Ba1#
      • 2.Bb2#
      • 2.Bc3#
      • 2.Bf6#
      • 2.Bg7#
      • 2.Bh8#
    • 1...Rd4
      • 2.Bf4#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd3#
      • 1...gxf4+
        • 2.Bg7#
      • 1...Ke4
        • 2.Qd3#
      • 1...Qxd6
        • 2.Bxd6#
      • 1...Rxf4
        • 2.Bd4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Rd2
        • 2.Qf3#
      • 1...Ra3
        • 2.Qe2#
      • 1...Sd2
        • 2.Qe2#
      • 1...Sb2
        • 2.Qe2#
      • 1...Sc5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT::QAB1(A)
    • Q(j);SBLOCK::R(G)+B(D),DCHECK
    • R(b);SBLOCK::QAR1(A)
    • R(f);SBLOCK::R(G)+B(D),DCHECK
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • P(h);CHECK,SBLOCK,XS(C)::R(G)+B(D)
      • K(d);P-FLIGHT::QAB1(A)
      • Q(j);OGATE,XP(F)::R(G)+B(D),XQ(j)
      • R(f);SBLOCK,XS(C)::R(G)+B(D),DCHECK
      • Q(j);N_GUARD::QAB1(A),XQ(j)
      • R(b);SBLOCK::QAR1(A)
      • R(b);N_GUARD::QAR1(A)
      • S(a);S_CUTR(b)::QAR1(A)
      • S(e);S_CUTR(b)::QAR1(A)
      • S(e);S_CUTQ(j)::QAB1(A)
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