MESON Chess Problem Database

Problem Display
PID: 231290 (b2k4/KnR5/pQ1p4/P2P4/4P3/7B/8/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1927

b2k4/KnR5/pQ1p4/P2P4/4P3/7B/8/8

#2

7 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa5
      • 2.Qb8#
    • 1...Sc5
      • 2.Qb8#
  • Tries
    • 1.Kxa8?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Bf1?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Bg2?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Bg4?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Bf5?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Be6?
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Rd7+?
      • 1...Kc8
        • 2.Rxd6#
        • 2.Rxb7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Rd8#
        • 2.Qc7#
        • 2.Qc6#
      • 1...Ke8!
    • 1.Qb1?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Qb3?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Qb4?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Ke8!
    • 1.Qb5?
      • threat
        • 2.Qd7#
      • 1...Kxc7
        • 2.Qd7#
        • 2.Qb6#
      • 1...Sc5
        • 2.Qb8#
      • 1...axb5!
    • 1.Qxa6?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Sxa5
        • 2.Qc8#
      • 1...Sc5
        • 2.Qc8#
      • 1...Ke8!
    • 1.Qxd6+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Sxd6!
    • 1.Qxb7?
      • threat
        • 2.Rc8#
        • 2.Qc8#
        • 2.Qb8#
      • 1...Ke8
        • 2.Rc8#
        • 2.Qxa8#
        • 2.Qc8#
        • 2.Qb8#
      • 1...Bxb7!
  • Keys
    • 1.Qb2!
      • 1...Kxc7
        • 2.Qb6#
      • 1...Ke8
        • 2.Qh8#
      • 1...Sxa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,XP(C)::QAR2(E)
    • S(c);OGATE::QAR2(E)
  • Tries
    • Try
      • K(F);P-FLIGHT,XB(d)
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(G)::QAB1(E)
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(G)::QAB1(E)
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(G)::QAB1(E)
        • S(c);OGATE,XP(C)::QAR2(E)
        • S(c);OGATE::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(c);OGATE::QAR2(E)
      • Refutation
        • P(a);XQ(E)
    • Try
      • Q(E);XP(a)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(G)::QAB1(E)
        • S(c);OGATE,XP(C)::QAR1(E)
        • S(c);OGATE::QAR1(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(e);P-FLIGHT::QAR1(E)
      • Refutation
        • S(c);XQ(E)
    • Try
      • Q(E);XS(c)
      • Threat
        • DUALS(3)
      • Refutation
        • B(d);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(G)::QAB1(E)
      • K(e);P-FLIGHT::QAR(E)
      • S(c);OGATE,XP(C)::QAR2(E)
      • S(c);OGATE::QAR2(E)
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