MESON Chess Problem Database

Problem Display
PID: 246996 (8/8/8/4PQp1/p4p2/Rq3k2/4N2R/4K3 w - - 0 1)

Klipachev, Vladimir Panteleevich

Uralski Problemist, 1997

8/8/8/4PQp1/p4p2/Rq3k2/4N2R/4K3

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.Rxc3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qe3
      • 2.Rf2#
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.Kf1?
      • threat
        • 2.Rh3#
      • 1...g4
        • 2.Qxf4#
      • 1...Ke3!
    • 1.Kd2?
      • 1...Qc3+
        • 2.Rxc3#
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Qe3+
        • 2.Rxe3#
      • 1...g4
        • 2.Qxf4#
      • 1...Qxa3!
    • 1.Sg1+?
      • 1...Kg3
        • 2.Qh3#
      • 1...Ke3!
    • 1.Sd4+?
      • 1...Kg3
        • 2.Qh3#
      • 1...Ke3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qh3#
      • 1...Qd1+
        • 2.Sxd1#
      • 1...Qb1+
        • 2.Sxb1#
      • 1...Qxc3+
        • 2.Rxc3#
      • 1...Ke3
        • 2.Qe4#
      • 1...Kg3
        • 2.Qh3#
      • 1...Qe6
        • 2.Sd5#
      • 1...g4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);CHECK,OGATE::R(D),XQ(a)
    • Q(a);OGATE::R(D),XQ(a)
    • Q(a);P_PINS(B)::R1(C)
    • P(e);N_GUARD::QAR1(F),XP(d)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • R(C)
      • Vars
        • P(e);N_GUARD::QAR1(F),XP(d)
      • Refutation
        • K(b);N_SPINP(d),P-FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • Q(a);CHECK,OGATE::R(D),XQ(a)
        • Q(a);CHECK,OGATE::R1(D),XQ(a)
        • P(e);N_GUARD::QAR1(F),XP(d)
      • Refutation
        • Q(a);N_SPINQ(a),XR(D)
    • Try
      • S(B);CHECK
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);N_SPINP(d),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);N_SPINP(d),P-FLIGHT
  • Actual
    • S(B);N_PINQ(a)
    • Threat
      • QAR2(F)
    • Vars
      • Q(a);CHECK::R(D)+S(B),XQ(a)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::R(D),XQ(a)
      • K(b);N_SPINP(d),P-FLIGHT::QAR1(F)
      • Q(a);P_PINP(E)::R(D)+S(B)
      • P(e);SBLOCK::QAR2(F)
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