MESON Chess Problem Database

Problem Display
PID: 151857 (b7/b2N4/p1B4B/r3p3/p3p2K/2Rn1k1N/7R/1Qn1r3 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1936

b7/b2N4/p1B4B/r3p3/p3p2K/2Rn1k1N/7R/1Qn1r3

#2

8 + 11

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sg1#
    • 1...Rc5
      • 2.Rf2#
    • 1...Bf2+
      • 2.Rxf2#
    • 1...Bc5
      • 2.Sxe5#
    • 1...Bb8
      • 2.Rf2#
  • Tries
    • 1.Rxd3+?
      • 1...Re3
        • 2.Sg1#
        • 2.Rf2#
      • 1...Be3
        • 2.Rf2#
      • 1...Sxd3!
    • 1.Qxd3+?
      • 1...Re3
        • 2.Sg1#
        • 2.Rf2#
        • 2.Qf1#
        • 2.Qxe4#
      • 1...Be3
        • 2.Rf2#
        • 2.Qxe4#
      • 1...Sxd3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qf8#
      • 1...Bf2+
        • 2.Rxf2#
      • 1...Re3
        • 2.Sg1#
      • 1...Rc5
        • 2.Rf2#
      • 1...Be3
        • 2.Qxe4#
      • 1...Bc5
        • 2.Sxe5#
      • 1...Se2
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD,N_SPINS(c),S_CUTB(j)::S(D)
    • R(g);S_CUTB(j)::R1(B)
    • B(j);CHECK,N_GUARD::R1(B),XB(j)
    • B(j);S_CUTR(g)::S(H),XP(h)
    • B(j);N_GUARD::R1(B)
  • Tries
    • Try
      • R(C);CHECK,XS(c)
      • Vars
        • B(j);P_SPINB(j)::R1(B)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(A);CHECK,XS(c)
      • Refutation
        • S(a);P_SPINS(a),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • B(j);CHECK,N_GUARD::R1(B),XB(j)
      • R(b);N_GUARD,N_SPINS(c),S_CUTB(j)::S(D)
      • R(g);S_CUTB(j)::R1(B)
      • B(j);N_SPINS(c),S_CUTR(b)::QAB1(A),XP(f)
      • B(j);S_CUTR(g)::S(H),XP(h)
      • S(a);S_CUTR(b)::QAB1(A),XP(f)
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