MESON Chess Problem Database

Problem Display
PID: 96833 (3nr3/2P1r2p/7Q/qkN3R1/1p4pK/1P2B3/8/7B w - - 0 1)

Wenman, Francis Percival (aka Percy Wenman)

200 Assorted Problems (Wenman), 1945

3nr3/2P1r2p/7Q/qkN3R1/1p4pK/1P2B3/8/7B

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Qa6#
    • 1...Qa6
      • 2.Se6#
      • 2.Qxa6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Sf7
      • 2.Qc6#
  • Tries
    • 1.cxd8Q?
      • threat
        • 2.Bc6#
        • 2.Qc6#
        • 2.Qd3#
      • 1...Qxd8
        • 2.Qa6#
      • 1...Rxe3
        • 2.Bc6#
        • 2.Qc6#
        • 2.Qd7#
      • 1...Rxd8
        • 2.Qc6#
      • 1...Qb6
        • 2.Qdxb6#
        • 2.Qhxb6#
      • 1...Qc7
        • 2.Qa6#
      • 1...Qa1
        • 2.Bc6#
        • 2.Qdb6#
        • 2.Qhb6#
        • 2.Qc6#
      • 1...Qa2
        • 2.Bc6#
        • 2.Qdb6#
        • 2.Qhb6#
        • 2.Qc6#
      • 1...Qa3
        • 2.Bc6#
        • 2.Qdb6#
        • 2.Qhb6#
        • 2.Qc6#
      • 1...Qa4
        • 2.Bc6#
        • 2.Qdb6#
        • 2.Qhb6#
        • 2.Qc6#
      • 1...Qa6
        • 2.Se6#
        • 2.Qxa6#
      • 1...Qa7
        • 2.Bc6#
        • 2.Qc6#
      • 1...Qa8
        • 2.Qdb6#
        • 2.Qhb6#
      • 1...Re4
        • 2.Qd7#
      • 1...Rc7
        • 2.Qd3#
      • 1...Rd7
        • 2.Bc6#
        • 2.Qc6#
        • 2.Qxd7#
      • 1...Re6!
  • Keys
    • 1.Qa6+!
      • 1...Qxa6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,XP(H)::QAB1(G)
    • S(g);N_GUARD::QAB1(G),XS(g)
    • S(g);N_GUARD::QAB1(G)
  • Tries
    • Try
      • P(H);XS(g)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);N_GUARD,XQ(H)::QAB1(G)
        • R(h);XQ(H)::QAB1(G)
        • Q(c);N_GUARD::QAB1(G)
        • R(e);N_GUARD::QAB(H)
        • R(e);::QAB(H)
      • Refutation
        • R(e);
  • Actual
    • Q(G);CHECK
    • Vars
      • Q(c);SBLOCK,XQ(G)::R(F)+S(E)
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