MESON Chess Problem Database

Problem Display
PID: 133997 (6BK/3pb1p1/2NP1n2/q1pRBNrp/2P1k2r/4P1p1/8/4nQ2 w - - 0 1)

Russell Johnson, Rev P

The Field, 1963

(First published on Thu Sep 19 1963)

6BK/3pb1p1/2NP1n2/q1pRBNrp/2P1k2r/4P1p1/8/4nQ2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qf4#
    • 1...Rh2
      • 2.Qf4#
    • 1...Rh3
      • 2.Qf4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Sf3
      • 2.Qd3#
      • 2.Qb1#
    • 1...Sg4
      • 2.Qf4#
    • 1...Sxd5
      • 2.Bxd5#
  • Tries
    • 1.Sxg3+?
      • 1...Kxe3
        • 2.Qe2#
      • 1...Rxg3!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Re5#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sxd5
        • 2.Bxd5#
      • 1...cxd4
        • 2.Rxd4#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qb1#
      • 1...Sg4
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::QAR1(A)
    • R(d);N_GUARD::QAR1(A),XR(d)
    • S(i);S_CUTR(d)::QAR1(A)
    • S(i);OGATE,XR(D)::B(I),XS(i)
  • Tries
    • Try
      • S(F);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT,XP(B)::QAR1(A)
      • Refutation
        • R(g);XS(F)
  • Actual
    • B(E);
    • Threat
      • R1(D)
    • Vars
      • R(g);OGATE,XS(F)::QAB1(A),XR(g)
      • B(k);XP(H)::S(F),XB(k)
      • S(i);OGATE,XR(D)::B(I),XS(i)
      • P(f);OGATE,XB(E)::R1(D),XP(f)
      • S(a);N_GUARD,SBLOCK::QAB(A)
      • S(a);OGATE,SBLOCK::QAB(A)
      • S(i);S_CUTR(g)::S(F),XP(b)
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