MESON Chess Problem Database

Problem Display
PID: 229092 (3Nb2q/7p/p6r/rkP1pQ2/p3R1Rp/B3Pp2/4n2K/5B2 w - - 0 1)

van Dijk, Johannes

5th HM., Brisbane Courier, 1926

3Nb2q/7p/p6r/rkP1pQ2/p3R1Rp/B3Pp2/4n2K/5B2

#2

9 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qd7#
    • 1...f2
      • 2.Bxe2#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.Rb4#
        • 2.Qb1#
        • 2.Qd3#
      • 1...Qg8
        • 2.Rb4#
      • 1...Rd6
        • 2.Rb4#
        • 2.Qb1#
      • 1...Bg6
        • 2.Rb4#
        • 2.Qd7#
      • 1...Bf7
        • 2.Rb4#
      • 1...Qxe5+!
    • 1.Qd7+?
      • 1...Rc6
        • 2.Qd3#
      • 1...Bxd7!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qb1#
      • 1...e4
        • 2.Rb4#
      • 1...Bg6
        • 2.Qd7#
      • 1...Sc1
        • 2.Rxc1#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Sd4
        • 2.Rcxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(k);N_GUARD,S_CUTR(i)::QAB(H)
    • P(b);N_GUARD::B(A),XS(a)
  • Tries
    • Try
      • R(E);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • Q(l);::R1(F)
        • B(k);::R1(F)
      • Refutation
        • Q(l);CHECK,XR(E)
    • Try
      • Q(H);CHECK
      • Vars
        • R(i);P_SPINR(i)::QAB(H)
      • Refutation
        • B(k);XQ(H)
  • Actual
    • R(E);N_PINS(a)
    • Threat
      • QAR(H)
    • Vars
      • P(g);::R1(E)
      • B(k);N_GUARD,S_CUTR(i)::QAB(H)
      • S(a);OGATEB::B(A)+R(E),XS(a)
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