MESON Chess Problem Database

Problem Display
PID: 10188 (7n/2n4r/2BNk1P1/Kp2b3/1Q3pPB/5N2/p3R3/q2r4 w - - 0 1)

Strydom, Jan

Comm., South African Chess Player, 1962

7n/2n4r/2BNk1P1/Kp2b3/1Q3pPB/5N2/p3R3/q2r4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rxe5#
    • 1...Qc1
      • 2.Rxe5#
    • 1...Rd4
      • 2.Rxe5#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sg5#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rh5
        • 2.Sxc7#
        • 2.Sg7#
        • 2.Qe7#
      • 1...Sf7
        • 2.Sxc7#
        • 2.Qe7#
      • 1...Sxe8!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sfg5#
      • 1...Rd6
        • 2.Sc5#
      • 1...Rh5
        • 2.Qe7#
      • 1...Bb2
        • 2.Sc3#
      • 1...Bc3
        • 2.Sxc3#
      • 1...Bd4
        • 2.Qd6#
      • 1...Bd6
        • 2.Sc5#
      • 1...Bf6
        • 2.Seg5#
      • 1...Bg7
        • 2.Qe7#
      • 1...Sf7
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::R1(A),XB(f)
    • R(b);S_CUTQ(a)::R1(A),XB(f)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(B)
      • Vars
        • R(b);N_GUARD::QAR1(C),XR(b)
      • Refutation
        • S(h);XS(H)
  • Actual
    • S(H);N_PINB(f)
    • Threat
      • S(B)
    • Vars
      • R(b);SBLOCK::S(H)
      • R(i);N_GUARD::QAR1(C)
      • B(f);::R(A)+S(H)
      • B(f);P_PINQ(C)::R(A)+S(H),XB(f)
      • B(f);N_GUARD,S_CUTR(b)::QAR1(C)
      • B(f);SBLOCK::R(A)+S(H),DCHECK
      • B(f);S_CUTR(i)::QAR1(C)
      • S(j);S_CUTR(i)::QAR1(C)
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