MESON Chess Problem Database

Problem Display
PID: 47664 (8/2p4K/6RN/2p1k1N1/4P1b1/p3PqP1/2P5/1nQ1B3 w - - 0 1)

Jankevics, Karlis

Problem Paradise, 2002

8/2p4K/6RN/2p1k1N1/4P1b1/p3PqP1/2P5/1nQ1B3

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Shf7#
    • 1...Qe2
      • 2.Shf7#
    • 1...Qg2
      • 2.Sxg4#
      • 2.Shf7#
    • 1...Qf1
      • 2.Sxg4#
    • 1...Qf2
      • 2.Sxg4#
    • 1...Qxg3
      • 2.Shf7#
      • 2.Bxg3#
    • 1...Qf4
      • 2.gxf4#
    • 1...Qf7+
      • 2.Shxf7#
    • 1...Qf8
      • 2.Sxg4#
    • 1...Bf5
      • 2.Shf7#
    • 1...Bh5
      • 2.Re6#
    • 1...Be6
      • 2.Rxe6#
    • 1...Sd2
      • 2.Qa1#
    • 1...Sc3
      • 2.Bxc3#
  • Tries
    • 1.Qb2+?
      • 1...Sc3
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...axb2!
    • 1.Qd2?
      • threat
        • 2.Qd5#
      • 1...Qf7+
        • 2.Shxf7#
      • 1...Qxe4
        • 2.Sgf7#
      • 1...Qd1
        • 2.Shf7#
      • 1...Be6
        • 2.Rxe6#
      • 1...Sc3
        • 2.Qxc3#
      • 1...c6
        • 2.Qd6#
      • 1...Sxd2!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd5#
      • 1...Qf7+
        • 2.Shxf7#
      • 1...Qxd1
        • 2.Shf7#
      • 1...Qxe4
        • 2.Sgf7#
      • 1...Be6
        • 2.Rxe6#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sc3
        • 2.Bxc3#
      • 1...c6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::S(I)
    • Q(c);N_GUARD::S(I),XB(d)
    • Q(c);OGATE::P(E),XQ(c)
    • Q(c);CHECK,N_GUARD::S(I),XQ(c)
    • B(d);P_PINR(H),S_CUTQ(c)::S(I)
    • B(d);N_GUARD::R1(H)
    • B(d);N_GUARD::R1(H),XB(d)
    • S(a);OGATE::QAB(A)
    • S(a);N_GUARD::B(B),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);CHECK,N_GUARD::S(I),XQ(c)
        • Q(c);N_GUARD,P_PINR(H),SBLOCK,XP(F)::S(G)
        • Q(c);N_GUARD::S(I)
        • B(d);N_GUARD::R1(H),XB(d)
        • S(a);N_GUARD::QAB(A),XS(a)
        • P(g);N_GUARD::QAB1(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(c);CHECK,N_GUARD::S(I),XQ(c)
      • Q(c);N_GUARD,XQ(A)::S(I)
      • Q(c);N_GUARD,P_PINR(H),SBLOCK,XP(F)::S(G)
      • B(d);N_GUARD::R1(H),XB(d)
      • S(a);OGATE::QAB(A)
      • S(a);N_GUARD::B(B),XS(a)
      • P(g);N_GUARD::QAB1(A)
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