MESON Chess Problem Database

Problem Display
PID: 193814 (q7/8/4p1Pp/7Q/R3Nk2/7P/2P2B1p/2K2n1b w - - 0 1)

van Dijk, Johannes

De Maasbode, 1916

q7/8/4p1Pp/7Q/R3Nk2/7P/2P2B1p/2K2n1b

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bg3#
    • 1...e5
      • 2.Qg4#
  • Tries
    • 1.Sc3+?
      • 1...Qe4
        • 2.Se2#
      • 1...Be4
        • 2.Se2#
      • 1...Qxa4!
    • 1.Sg3+?
      • 1...Qe4
        • 2.Se2#
      • 1...Be4
        • 2.Se2#
      • 1...Qxa4!
    • 1.Sc5+?
      • 1...Qe4
        • 2.Sd3#
        • 2.Sxe6#
      • 1...Be4
        • 2.Sd3#
        • 2.Sxe6#
      • 1...Qxa4!
    • 1.Qh4+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf6#
      • 1...Ke5!
    • 1.Qg5+?
      • 1...Kf3
        • 2.Qg4#
      • 1...hxg5!
    • 1.Qxh6+?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf3!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qg4#
      • 1...Kxe4
        • 2.Ba7#
      • 1...Bf3
        • 2.Qe5#
      • 1...Se3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,SBLOCK::B(C)
    • P(e);SBLOCK::QAR1(G)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(F)
        • B(b);P_SPINB(b)::S(F)
      • Refutation
        • Q(g);XR(E)
    • Try
      • S(F);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(F)
        • B(b);P_SPINB(b)::S(F)
      • Refutation
        • Q(g);XR(E)
    • Try
      • S(F);CHECK
      • Refutation
        • Q(g);XR(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G)
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G)
      • Refutation
        • P(f);XQ(G)
    • Try
      • Q(G);CHECK,XP(f)
      • Vars
        • K(d);S_FLIGHT::QAR2(G)
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);OGATEB,P-FLIGHT,XS(F)::R(E)+B(C)
      • B(b);SBLOCK::QAB1(G)
      • S(a);SBLOCK::B(C)
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