MESON Chess Problem Database

Problem Display
PID: 250062 (Q7/7K/3p4/3N4/4k3/2Rq1N2/3R3P/8 w - - 0 1)

Dvorak, Franz

Schackvarlden, 1927

Q7/7K/3p4/3N4/4k3/2Rq1N2/3R3P/8

#2

7 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe8+?
      • 1...Kxd5+
        • 2.Rdxd3#
      • 1...Kf5
        • 2.Qg6#
      • 1...Kxf3+!
  • Keys
    • 1.Qc8!
      • 1...Kxf3+
        • 2.Qf5#
      • 1...Kxd5+
        • 2.Qf5#
      • 1...Qxd2
        • 2.Qe6#
      • 1...Qxc3
        • 2.Qg4#
      • 1...Qxf3
        • 2.Qe6#
      • 1...Qxd5
        • 2.Qg4#
      • 1...Qb1
        • 2.Rd4#
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qf1
        • 2.Rd4#
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qc2
        • 2.Rd4#
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qe2
        • 2.Rd4#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qc4
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qb5
        • 2.Rd4#
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qa6
        • 2.Rd4#
        • 2.Re3#
        • 2.Qg4#
        • 2.Qe6#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Qd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);CHECK,N_GUARD,P_SPINQ(a),S_FLIGHT,XS(E)::R(A),XQ(a)
        • K(b);N_GUARD,S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);CHECK,P_SPINQ(a),S_FLIGHT,XS(D)
  • Actual
    • Q(G);
    • Vars
      • K(b);CHECK,N_GUARD,P_SPINQ(a),S_FLIGHT,XS(D)::QAR2(G)
      • K(b);CHECK,N_GUARD,P_SPINQ(a),S_FLIGHT,XS(E)::QAR2(G)
      • Q(a);XR(A)::QAR2(G)
      • Q(a);XR(C)::QAR2(G)
      • Q(a);XS(D)::QAR2(G)
      • Q(a);XS(E)::QAR2(G)
      • Q(a);OGATE::R1(C),XQ(a)
      • Q(a);OGATE::R1(A),XQ(a)
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Developed and maintained by Brian Stephenson.
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