MESON Chess Problem Database

Problem Display
PID: 21594 (8/8/1p6/1K2P3/5p2/R3qk2/5N2/2N2Q2 w - - 0 1)

Hartong, Jan

1st Prize, American Chess Bulletin (Dalton TT), 1920

8/8/1p6/1K2P3/5p2/R3qk2/5N2/2N2Q2

#2

6 + 4

5501 Chess Cameos 1936
56 The Problemist 1938
3310 2345 Chess Problems 1997
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3+
      • 2.Rxb3#
    • 1...Qc3
      • 2.Rxc3#
    • 1...Qd3+
      • 2.Rxd3#
  • Tries
    • 1.Se2?
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Qc3
        • 2.Rxc3#
      • 1...Qxa3!
    • 1.Qg1?
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Qc3
        • 2.Rxc3#
      • 1...Qxa3!
  • Keys
    • 1.Scd3!
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qxd3+
        • 2.Rxd3#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Kg3
        • 2.Qh3#
      • 1...Qxf2
        • 2.Sxf2#
      • 1...Qc1
        • 2.Sxc1#
        • 2.Se1#
      • 1...Qd2
        • 2.Se1#
      • 1...Qd4
        • 2.Se1#
      • 1...Qe1
        • 2.Sxe1#
      • 1...Qe2
        • 2.Qh3#
      • 1...Qe4
        • 2.Se1#

This anticipates 203496(1924), 16419(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • Q(a);CHECK,OGATEB::R(D),XQ(a)
    • Q(a);OGATEB::R(D),XQ(a)
  • Tries
    • Try
      • S(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(D),XQ(a)
        • Q(a);OGATEB::R(D),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(D)
    • Try
      • Q(B);
      • Vars
        • Q(a);CHECK,OGATEB::R(D),XQ(a)
        • Q(a);OGATEB::R(D),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(D)
  • Actual
    • S(A);N_PINQ(a)
    • Vars
      • Q(a);CHECK::R(D)+S(A),XQ(a)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(A)::R(D),XQ(a)
      • Q(a);CHECK,XP(F)::R(D)+S(A),DCHECK,XQ(a)
      • K(b);P-FLIGHT::QAR1(B)
      • Q(a);P_SPINQ(a),XS(C)::R(D)+S(A),XQ(a)
      • Q(a);::R(D)+S(A),DCHECK
      • Q(a);::R(D)+S(A),DCHECK,XQ(a)
      • Q(a);P_PINS(A),SBLOCK::QAR2(B)
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