MESON Chess Problem Database

Problem Display
PID: 48134 (8/7Q/6B1/6B1/8/8/pn1P1N2/K1kqb2R w - - 0 1)

Rosado, Virgillio E

The Chess Review, 1938

8/7Q/6B1/6B1/8/8/pn1P1N2/K1kqb2R

#2

7 + 5

5064 100 Years of the American Two-move Chess Problem 1962
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.d4#
  • Tries
    • 1.Qc7+?
      • 1...Qc2
        • 2.Qxc2#
        • 2.d3#
        • 2.d4#
      • 1...Sc4!
  • Keys
    • 1.Bb1!
      • 1...axb1Q+
        • 2.Qxb1#
      • 1...axb1R+
        • 2.Qxb1#
      • 1...Qxd2
        • 2.Qc2#
      • 1...Bxd2
        • 2.Qc2#
      • 1...Bxf2
        • 2.Qc2#
      • 1...axb1S
        • 2.Qxb1#
      • 1...axb1B
        • 2.Qxb1#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qe2
        • 2.Qc2#
      • 1...Qb3
        • 2.d3#
      • 1...Qf3
        • 2.Qc2#
      • 1...Qa4
        • 2.d4#
      • 1...Qg4
        • 2.Qc2#
      • 1...Qh5
        • 2.Qc2#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sa4
        • 2.Sd3#
      • 1...Sc4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD,P_SPINB(c)::B(E)+P(C)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • B(F);
    • Vars
      • P(d);CHECK,OGATE,XB(F)::QAR1(G),XQ(d)
      • P(d);CHECK,OGATE,XB(F)::QAR1(G),XR(d)
      • Q(b);N_GUARD,P_SPINB(c),P_SPINQ(b),XP(C)::QAR1(G)
      • B(c);P_SPINB(c),P_SPINQ(b),XP(C)::QAR1(G)
      • B(c);P_SPINQ(b),XS(D)::QAR1(G)
      • P(d);OGATE,XB(F)::QAR1(G),XS(d)
      • P(d);OGATE,XB(F)::QAR1(G),XB(d)
      • Q(b);N_GUARD,P_SPINB(c)::QAR1(G),XQ(b)
      • Q(b);N_GUARD,P_SPINB(c)::QAR1(G)
      • Q(b);N_GUARD,P_SPINB(c)::B(E)+P(C)
      • S(e);N_GUARD::S(D),XS(e)
      • S(e);N_GUARD::S(D)
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