MESON Chess Problem Database

Problem Display
PID: 119780 (8/pP6/k1PK4/3N4/2P1p3/2n1p3/4QB2/8 w - - 0 1)

Cauveren, Jonas Ephraim

Tijdschrift vd NSB, 1906

8/pP6/k1PK4/3N4/2P1p3/2n1p3/4QB2/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qa2#
    • 1...Sa2
      • 2.Qxa2#
  • Tries
    • 1.Qa2+?
      • 1...Sa4
        • 2.Qxa4#
      • 1...Sxa2!
    • 1.Qxe3?
      • threat
        • 2.Qxa7#
      • 1...Ka5
        • 2.Qxa7#
      • 1...Sb5+!
    • 1.b8Q?
      • 1...Sb5+
        • 2.Qxb5#
      • 1...Ka5
        • 2.Qxa7#
      • 1...Sxe2
        • 2.Qb5#
      • 1...Sxd5
        • 2.Qa2#
        • 2.Qb5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa2#
        • 2.Qb5#
      • 1...Sa2
        • 2.Qxa2#
        • 2.Qb5#
      • 1...Sa4
        • 2.Qb5#
      • 1...exf2!
  • Keys
    • 1.Be1!
      • 1...Sb5+
        • 2.cxb5#
      • 1...Ka5
        • 2.Qa2#
      • 1...Sxe2
        • 2.b8S#
      • 1...Sxd5
        • 2.c5#
      • 1...Sb1
        • 2.c5#
        • 2.b8S#
      • 1...Sd1
        • 2.Qa2#
        • 2.c5#
        • 2.b8S#
      • 1...Sa2
        • 2.Qxa2#
        • 2.c5#
        • 2.b8S#
      • 1...Sa4
        • 2.c5#
        • 2.b8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAR(A)
    • S(a);N_GUARD::QAR(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);XP(b)
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • K(d);P-FLIGHT::QAR2(A),XP(e)
      • Refutation
        • S(a);CHECK
    • Try
      • P(G);
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(G),XS(a)
        • K(d);P-FLIGHT::QAR2(G),XP(e)
        • S(a);N_GUARD,XQ(A)::QAB1(G)
        • S(a);N_GUARD::QAB1(G)
      • Refutation
        • P(b);XB(B)
  • Actual
    • B(B);
    • Vars
      • S(a);CHECK,OGATE::P(C),XS(a)
      • K(d);P-FLIGHT,P_SPINS(a)::QAR(A)
      • S(a);XQ(A)::P=S
      • S(a);N_GUARD,XS(D)::QAB(A)+P(C)
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Developed and maintained by Brian Stephenson.
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