MESON Chess Problem Database

Problem Display
PID: 86510 (2b5/8/8/1N1Q4/3N1Kp1/2PpP3/2PkP3/7R w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Tidskrift for Schack, 1981

2b5/8/8/1N1Q4/3N1Kp1/2PpP3/2PkP3/7R

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3+?
      • 1...Kxe2
        • 2.Qg2#
      • 1...Kxc2!
    • 1.Sf3+?
      • 1...Kxc2
        • 2.Qa2#
      • 1...gxf3
        • 2.Qxd3#
      • 1...Kxe2!
    • 1.Sf5?
      • threat
        • 2.Qxd3#
      • 1...Kxc2
        • 2.Qa2#
      • 1...Kxe2
        • 2.Qg2#
      • 1...Bxf5!
    • 1.Sc6?
      • threat
        • 2.Qxd3#
      • 1...Kxc2
        • 2.Qa2#
      • 1...Kxe2
        • 2.Qg2#
      • 1...Bf5!
    • 1.Qa2?
      • threat
        • 2.cxd3#
      • 1...dxc2
        • 2.Qxc2#
      • 1...dxe2
        • 2.Sb3#
      • 1...Be6!
    • 1.Qg2?
      • threat
        • 2.exd3#
      • 1...dxc2
        • 2.Sb3#
      • 1...dxe2
        • 2.Qxe2#
      • 1...Bb7!
    • 1.Qc4?
      • threat
        • 2.Qxd3#
      • 1...dxc2
        • 2.Sb3#
        • 2.Qd3#
      • 1...dxe2
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Bf5!
    • 1.Qe4?
      • threat
        • 2.Qxd3#
      • 1...dxc2
        • 2.Qxc2#
        • 2.Qd3#
      • 1...dxe2
        • 2.Sb3#
        • 2.Qd3#
      • 1...Bf5!
    • 1.Qf5?
      • threat
        • 2.Qxd3#
      • 1...dxc2
        • 2.Qxc2#
        • 2.Qd3#
      • 1...dxe2
        • 2.Sb3#
        • 2.Qd3#
      • 1...Bxf5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qxd3#
      • 1...Kxc2
        • 2.Qa2#
      • 1...Kxe2
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK,P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XP(C)::QAR2(I)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XP(B)
    • Try
      • S(F);CHECK,P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XP(B)::QAR2(I)
        • P(c);XS(F)::QAR1(I),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • S(F);P_PINP(b)
      • Threat
        • QAR1(I),XP(b)
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(B)::QAR2(I)
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(C)::QAR2(I)
      • Refutation
        • B(d);XS(F)
    • Try
      • S(F);P_PINP(b)
      • Threat
        • QAR1(I),XP(b)
      • Vars
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(B)::QAR2(I)
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(C)::QAR2(I)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • QAR(I)+P(B),XP(b)
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(B)::QAR1(I),XP(b)
        • P(b);SBLOCK,XP(C)::S(F)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • QAR(I)+P(C),XP(b)
      • Vars
        • P(b);SBLOCK,XP(B)::S(F)
        • P(b);OGATE,P_SPINP(b),XP(C)::QAR1(I),XP(b)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(b)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(b)
      • Refutation
        • B(d);
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(b)
      • Refutation
        • B(d);XQ(I)
  • Actual
    • S(F);P_PINP(b)
    • Threat
      • QAR1(I),XP(b)
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(B)::QAR2(I)
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(C)::QAR2(I)
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