MESON Chess Problem Database

Problem Display
PID: 86884 (2b2R2/3pP1P1/5Kpr/p2B2p1/Qq3kP1/4N3/3PP3/2B3R1 w - - 0 1)

Gribenko, I

Cherkasskaya Pravda, 1986

2b2R2/3pP1P1/5Kpr/p2B2p1/Qq3kP1/4N3/3PP3/2B3R1

#2

12 + 8

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Qe4
      • 2.Qxe4#
  • Tries
    • 1.Sd1?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qe4
        • 2.Qxe4#
        • 2.d3#
      • 1...Rh3!
    • 1.Sf1?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qe4
        • 2.Qxe4#
        • 2.d3#
      • 1...Rh3!
    • 1.Sc2?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qe4
        • 2.Qxe4#
        • 2.d3#
      • 1...Rh3!
    • 1.Bb2?
      • threat
        • 2.Be5#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...d6!
    • 1.Bf3?
      • threat
        • 2.Sd5#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...d5
        • 2.Sxd5#
      • 1...Bb7!
    • 1.d3?
      • threat
        • 2.Sd1#
        • 2.Sf1#
        • 2.Sc2#
        • 2.Sf5#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Rh3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.e3#
      • 1...Qc3+
        • 2.dxc3#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qxe7+
        • 2.Kxe7#
      • 1...Qb2+
        • 2.Sxb2#
      • 1...Qb6+
        • 2.Sxb6#
      • 1...Qxd2
        • 2.Bxd2#
      • 1...Rh3
        • 2.Kxg6#
      • 1...Qa3
        • 2.Sxa3#
      • 1...Qc5
        • 2.d4#
      • 1...Qb3
        • 2.d3#

This anticipates 16251(2000/II)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE::QAR(F),XQ(a)
    • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
    • Q(a);OGATE::QAR1(F),XQ(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
      • Refutation
        • R(f);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
      • Refutation
        • R(f);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
      • Refutation
        • R(f);
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
      • Refutation
        • P(g);
    • Try
      • B(H);
      • Threat
        • S(E)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
        • P(g);::S(E),XP(g)
      • Refutation
        • B(h);
    • Try
      • P(C);
      • Threat
        • DUALS(4)
      • Vars
        • Q(a);CHECK,OGATE::QAR2(F),XQ(a)
      • Refutation
        • R(f);
  • Actual
    • S(E);N_PINQ(a)
    • Threat
      • P(D)
    • Vars
      • Q(a);CHECK,OGATE::B(A)+P(C),XQ(a)
      • Q(a);CHECK::QAR(F)+S(E),XQ(a)
      • Q(a);CHECK,XP(J)::R(L)+K(I),XQ(a)
      • Q(a);OGATE,P_SPINQ(a),XP(C)::B(A),XQ(a)
      • R(f);::R(L)+K(I),XP(e)
      • Q(a);::QAR(F)+S(E),XQ(a)
      • Q(a);N_GUARD::B(A)+P(C)
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