MESON Chess Problem Database

Problem Display
PID: 231294 (2r5/4p3/R3P3/2kp4/8/Kn3P2/1P2BN2/3Q4 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1927

2r5/4p3/R3P3/2kp4/8/Kn3P2/1P2BN2/3Q4

#2

8 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.b4#
    • 1...Sc1
      • 2.b4#
    • 1...Sd4
      • 2.b4#
    • 1...Sa5
      • 2.b4#
  • Tries
    • 1.Qxb3?
      • threat
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qb6#
      • 1...Rc6
        • 2.Qb4#
      • 1...Rb8
        • 2.Qc3#
      • 1...d4
        • 2.Sd3#
        • 2.Se4#
        • 2.Qc4#
        • 2.Qb5#
      • 1...Kd4!
    • 1.Qd2?
      • threat
        • 2.Qc3#
        • 2.Qb4#
      • 1...Rc6
        • 2.Qb4#
      • 1...d4
        • 2.Qg5#
      • 1...Rb8
        • 2.Qc3#
      • 1...Sa5
        • 2.Qb4#
        • 2.b4#
      • 1...Sxd2!
    • 1.Qd3?
      • threat
        • 2.Qc3#
      • 1...d4
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qf5#
      • 1...Sd2
        • 2.b4#
      • 1...Sa5
        • 2.b4#
      • 1...Rc6!
    • 1.Qd4+?
      • 1...Sxd4
        • 2.b4#
      • 1...Kxd4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Se4#
      • 1...Kd4
        • 2.Sg4#
      • 1...Sd4
        • 2.b4#
      • 1...d4
        • 2.Qg5#

This is a version of 231286

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::P(B)
  • Tries
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(e);::QAB1(A)
        • R(e);::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::QAB1(A)
        • P(c);OGATEB,SBLOCK::QAR(A)
        • R(e);::QAR2(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(a);OGATE::P(B)
      • Refutation
        • R(e);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);OGATE,SBLOCK,XQ(A)::P(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(D),DCHECK
    • Vars
      • K(b);S_FLIGHT::QAB(A)+S(D)
      • S(a);OGATE,SBLOCK::P(B)
      • P(c);OGATEB,SBLOCK::QAR(A)
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