MESON Chess Problem Database

Problem Display
PID: 228944 (7b/B2N4/1R6/P5Qp/2Pk2p1/p6q/B1bppN2/Kn4r1 w - - 0 1)

Hartong, Jan

1st Prize, Western Morning News, 1926

(First published on Sat Aug 21 1926)

7b/B2N4/1R6/P5Qp/2Pk2p1/p6q/B1bppN2/Kn4r1

#2

9 + 11

6490 yacpdb 2020
15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.Rb2#
    • 1...Be5
      • 2.Qxe5#
    • 1...Sc3+
      • 2.Rb1#
  • Tries
    • 1.Qxd2+?
      • 1...Qd3
        • 2.Rxb1#
        • 2.Rb2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Ra6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Bd3
        • 2.Rxb1#
        • 2.Rb2#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Ra6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Sxd2+!
    • 1.Qe3+?
      • 1...Kxe3+
        • 2.Rf6#
      • 1...Qxe3!
    • 1.Qf6+?
      • 1...Ke3
        • 2.Rxb1#
        • 2.Rb2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Ra6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Re6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Bxf6!
    • 1.Qd5+?
      • 1...Ke3+
        • 2.Rf6#
      • 1...Kc3!
    • 1.Qg7+?
      • 1...Ke3
        • 2.Rf6#
      • 1...Bxg7!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Rb3#
      • 1...Ke3+
        • 2.Rf6#
      • 1...Qc3+
        • 2.Rb2#
      • 1...Sc3+
        • 2.Rb1#
      • 1...Kc3
        • 2.Qxh8#
      • 1...Qb3
        • 2.Rxb3#
      • 1...Bb3
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(g);CHECK,SBLOCK::B(H)+R(G)
    • B(k);N_GUARD::QAB1(F),XB(k)
    • S(a);CHECK,SBLOCK::B(H)+R(G)
  • Tries
    • Try
      • Q(F);CHECK,XP(d)
      • Refutation
        • S(a);CHECK,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);CHECK,S_FLIGHT,XQ(F)::B(H)+R(G)
      • Refutation
        • Q(g);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • B(k);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);CHECK,S_FLIGHT::B(H)+R(G)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);P_PINQ(F),S_FLIGHT::B(H)+R(G)
      • Refutation
        • B(k);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • B(H)+R(G)
    • Vars
      • K(h);CHECK,S_FLIGHT::B(H)+R(G)
      • Q(g);CHECK,SBLOCK::B(H)+R(G)
      • S(a);CHECK,SBLOCK::B(H)+R(G)
      • K(h);S_FLIGHT::QAB(F),XB(k)
      • Q(g);::B(H)+R(G),XQ(g)
      • B(c);::B(H)+R(G),XB(c)
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