MESON Chess Problem Database

Problem Display
PID: 207531 (Q7/8/8/1B3N2/4Rp1P/5k2/2P4K/8 w - - 0 1)

Blumenthal, Oscar

Vasarnapi Ujsag, 1872

Q7/8/8/1B3N2/4Rp1P/5k2/2P4K/8

#2

7 + 2

4817 English Mechanic and World of Science 1875
15239 Valois Notebooks 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Re1+?
      • 1...Kf2
        • 2.Rf1#
      • 1...Kg4!
    • 1.Re3+?
      • 1...Kf2
        • 2.Qg2#
        • 2.Qf3#
      • 1...Kg4!
    • 1.Re5+?
      • 1...Kf2
        • 2.Qg2#
      • 1...Kg4!
    • 1.Re6+?
      • 1...Kf2
        • 2.Qg2#
      • 1...Kg4!
    • 1.Re7+?
      • 1...Kf2
        • 2.Qg2#
      • 1...Kg4!
    • 1.Re8+?
      • 1...Kf2
        • 2.Qg2#
      • 1...Kg4!
    • 1.Qd5?
      • 1...Kg4
        • 2.Be2#
      • 1...Kf2!
    • 1.Qe8?
      • 1...Kf2
        • 2.Rxf4#
      • 1...Kg4!
    • 1.Qg8?
      • threat
        • 2.Qg2#
      • 1...Kf2
        • 2.Qg2#
      • 1...Kxe4!
  • Keys
    • 1.Qa5!
      • 1...Kf2
        • 2.Rxf4#
      • 1...Kxe4
        • 2.Bc6#
      • 1...Kg4
        • 2.Be2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::B(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);P-FLIGHT::R(C),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(a);P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(G);
    • Vars
      • K(a);P-FLIGHT::R(C),XP(b)
      • K(a);OGATEB,S_FLIGHT,XR(C)::B(E)
      • K(a);P_SPINP(b),S_FLIGHT::B(E)
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