MESON Chess Problem Database

Problem Display
PID: 250396 (8/2K5/2p1p3/2pk4/8/3PpR2/4N3/1Q6 w - - 0 1)

Murashev, Pavel Aleksandrovich

Uralski Problemist, 2009

8/2K5/2p1p3/2pk4/8/3PpR2/4N3/1Q6

#2

5 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qb2#
      • 1...Ke5!
    • 1.Qc2?
      • 1...Ke5
        • 2.Qxc5#
      • 1...e5
        • 2.Qc4#
      • 1...c4!
    • 1.Qa1?
      • threat
        • 2.Sf4#
      • 1...c4
        • 2.Qd4#
      • 1...e5!
    • 1.Qc1?
      • 1...Ke5
        • 2.Qxc5#
      • 1...e5
        • 2.Qc4#
      • 1...c4!
    • 1.Qg1?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...c4!
    • 1.Qh1?
      • threat
        • 2.Rxe3#
        • 2.Rf5#
      • 1...Ke5
        • 2.Qh5#
      • 1...c4
        • 2.Rf5#
      • 1...e5!
    • 1.Qb2?
      • threat
        • 2.Sf4#
      • 1...c4
        • 2.Qd4#
      • 1...e5!
    • 1.Qb4?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qxc5#
        • 2.Qe4#
      • 1...e5
        • 2.Qc4#
      • 1...c4
        • 2.Qd6#
      • 1...cxb4!
    • 1.Qb5?
      • 1...Ke5
        • 2.Qxc5#
      • 1...e5
        • 2.Qc4#
        • 2.Qxc6#
      • 1...cxb5!
    • 1.Qb8?
      • 1...Ke5
        • 2.Kxc6#
      • 1...e5
        • 2.Qg8#
      • 1...c4!
  • Keys
    • 1.Qb6!
      • 1...Ke5
        • 2.Qxc5#
      • 1...e5
        • 2.Qxc6#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR2(A),XP(b)
        • P(e);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR2(A),XP(b)
        • P(e);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT,S_CUTP(e)::QAR2(A)
        • P(e);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,S_CUTP(e)::QAR(A)
        • P(b);::QAB(A)+R(D),DCHECK
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(e);SBLOCK::QAB1(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);P_PINP(b)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR2(A),XP(b)
      • Refutation
        • P(d);N_SPINP(b),XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAB(A)+K(E),XP(d)
        • P(e);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(c);N_GUARD,P-FLIGHT::QAR2(A),XP(b)
      • P(e);SBLOCK::QAB1(A),XP(d)
      • P(b);OGATE::QAR1(A)
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