MESON Chess Problem Database

Problem Display
PID: 231288 (1b4R1/8/r4p2/p7/4pkP1/R1B2p2/5Q2/4Kn1N w - - 0 1)

van Dijk, Johannes

De Maasbode, 1927

1b4R1/8/r4p2/p7/4pkP1/R1B2p2/5Q2/4Kn1N

#2

7 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qg3#
      • 2.Qh2#
    • 1...e3
      • 2.Ra4#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Se2#
        • 2.Sh5#
      • 1...e3
        • 2.Ra4#
      • 1...Sxg3!
    • 1.Qe3+?
      • 1...Kxe3
        • 2.Be5#
      • 1...Sxe3!
    • 1.Qg3+?
      • 1...Ke3
        • 2.Ba1#
        • 2.Bb2#
        • 2.Be5#
        • 2.Bxf6#
      • 1...Sxg3!
    • 1.Qd2+?
      • 1...Se3
        • 2.Qh2#
      • 1...e3
        • 2.Ra4#
        • 2.Qd4#
      • 1...Sxd2!
    • 1.Qh2+?
      • 1...Ke3
        • 2.Ba1#
        • 2.Bb2#
        • 2.Be5#
        • 2.Bxf6#
      • 1...Sg3
        • 2.Qh6#
      • 1...Sxh2!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qh6#
      • 1...f2+
        • 2.Qxf2#
      • 1...Ke3
        • 2.Be5#
      • 1...e3
        • 2.Ra4#
      • 1...f5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::R(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::R(D)
      • Refutation
        • S(a);XS(B)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(d);S_FLIGHT,XQ(C)::R(D)+B(E)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • S(a);N_GUARD,P_SPINS(a),SBLOCK::QAB(C)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • S(a);P_SPINS(a)::QAB(C)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);N_PINP(b)
    • Threat
      • QAB(C)
    • Vars
      • P(b);CHECK,OGATEB::QAR2(C),XP(b)
      • K(d);S_FLIGHT::R(D)+B(E)
      • P(c);OGATEB,SBLOCK::R(D)
      • P(g);N_GUARD::QAB1(C)
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Developed and maintained by Brian Stephenson.
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