MESON Chess Problem Database

Problem Display
PID: 84983 (8/5p2/n1pN1K2/rP1kP1p1/8/1N5Q/6p1/3rn3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Telescacco 92, 1996

8/5p2/n1pN1K2/rP1kP1p1/8/1N5Q/6p1/3rn3

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qxg2#
      • 2.Qf3#
    • 1...Sd3
      • 2.Qxg2#
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
  • Tries
    • 1.Qxg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxg2!
    • 1.Qg4?
      • threat
        • 2.Qc4#
        • 2.Qe4#
      • 1...cxb5
        • 2.Qe4#
      • 1...Rc1
        • 2.Qd4#
        • 2.Qe4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qc4#
      • 1...Ra4!
    • 1.Qc3?
      • threat
        • 2.Qc4#
        • 2.Qxc6#
      • 1...Rxb5
        • 2.Qc4#
      • 1...Ra4
        • 2.Qxc6#
      • 1...Rc1
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
        • 2.Qxc6#
      • 1...Sb4
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sc5
        • 2.Qc4#
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qc4#
        • 2.Qc5#
      • 1...c5
        • 2.Qc4#
      • 1...cxb5!
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Ra4!
    • 1.Qh7?
      • threat
        • 2.Qe4#
        • 2.Qxf7#
      • 1...cxb5
        • 2.Qe4#
      • 1...Ra4
        • 2.Qxf7#
      • 1...Rd4
        • 2.Qxf7#
      • 1...Sc7
        • 2.Qe4#
      • 1...Sc5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxc6#
        • 2.Qxf7#
      • 1...Rxb5
        • 2.Qxf7#
      • 1...cxb5
        • 2.Qb7#
      • 1...Rc1
        • 2.Qxf7#
      • 1...Sb4
        • 2.Qxf7#
      • 1...Sc5
        • 2.Qxc6#
      • 1...Sc7
        • 2.Qxc6#
      • 1...Sb8
        • 2.Qxf7#
      • 1...c5
        • 2.Qc6#
        • 2.Qb7#
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::QAB(B),XS(b)
  • Tries
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XP(C)::QAB1(B)
        • R(a);N_GUARD::QAR1(B),XR(a)
        • S(g);::QAB1(B)
      • Refutation
        • R(d);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XP(C)::QAB1(B)
        • R(d);::QAB1(B),XP(h)
        • R(a);N_GUARD::QAR1(B)
        • P(h);::QAB1(B)
      • Refutation
        • P(h);XP(C)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD::QAR1(B),XR(a)
        • S(g);N_GUARD::QAR1(B),XS(g)
      • Refutation
        • R(d);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XP(C)::QAB1(B)
        • R(d);::QAB(B),XP(i)
        • R(a);::QAB(B),XP(i)
        • S(g);::QAB1(B)
      • Refutation
        • S(g);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(d);XP(C)::QAB(B),XP(i)
      • P(h);OGATEB,XP(C)::QAB(B)
      • R(a);::QAB(B),XP(i)
      • S(g);::QAB(B),XP(i)
      • S(g);::QAB1(B),XP(h)
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