MESON Chess Problem Database

Problem Display
PID: 95863 (2K3B1/4B3/2k2p2/n2N4/3n4/N7/6Q1/8 w - - 0 1)

Paavilainen, Jorma

Politika Meredith Ty., 1998

2K3B1/4B3/2k2p2/n2N4/3n4/N7/6Q1/8

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb6#
      • 1...Se6
        • 2.Qb5#
      • 1...Sdb3
        • 2.Qxf6#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc4
        • 2.Qb7#
      • 1...Sab3!
    • 1.Qc2+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxc2!
    • 1.Qe2?
      • threat
        • 2.Qa6#
      • 1...Se6
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxe2!
    • 1.Qh2?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...Se6
        • 2.Qd6#
      • 1...Sf5
        • 2.Qc7#
      • 1...Sc4
        • 2.Qc7#
      • 1...Sb7
        • 2.Qc7#
      • 1...Sb5!
    • 1.Qg3?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...Se6
        • 2.Qd6#
      • 1...Sf5
        • 2.Qc7#
      • 1...Sc4
        • 2.Qc7#
      • 1...Sb7
        • 2.Qc7#
      • 1...Sb5!
    • 1.Qg4?
      • threat
        • 2.Qd7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sf5
        • 2.Qa4#
      • 1...f5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qa6#
      • 1...Se6
        • 2.Qb5#
      • 1...Se2
        • 2.Qxf6#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);OGATE::QAR(A),XP(d)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(A),XS(b)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(b);N_GUARD::QAR2(A),XS(b)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • S(b);::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • S(b);::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR2(A),XS(a)
        • S(a);OGATE::QAB(A)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAR(A),XP(d)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(b);N_GUARD::QAR2(A),XS(b)
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