MESON Chess Problem Database

Problem Display
PID: 160335 (2n1R3/1nBppN2/6p1/5PP1/N2pk2K/1Q3R1B/2P1bp2/2q3b1 w - - 0 1)

Abdullayev, Elmar

Melnichuk, Aleksandr Nikolaevich

Shakhmatnaya kompozitsiya, 2014

2n1R3/1nBppN2/6p1/5PP1/N2pk2K/1Q3R1B/2P1bp2/2q3b1

#2

11 + 11

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Rf4#
    • 1...Qa3
      • 2.Rf4#
    • 1...Qf4+
      • 2.Rxf4#
    • 1...Qxg5+
      • 2.Sxg5#
    • 1...Qa1
      • 2.Rf4#
    • 1...Qb1
      • 2.Rf4#
    • 1...Qd1
      • 2.Rf4#
    • 1...Qe1
      • 2.Rf4#
    • 1...Qf1
      • 2.Rf4#
    • 1...Qxc2
      • 2.Rf4#
    • 1...Sa5
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sbd6
      • 2.Sc5#
    • 1...Sd8
      • 2.Sc5#
    • 1...Sb6
      • 2.Rxe7#
    • 1...Scd6
      • 2.Rxe7#
    • 1...Sa7
      • 2.Rxe7#
    • 1...gxf5
      • 2.Bxf5#
    • 1...e5
      • 2.Rxe5#
  • Tries
    • 1.Sb6?
      • threat
        • 2.Qd5#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Bxf3
        • 2.Qd3#
      • 1...Sxb6
        • 2.Rxe7#
      • 1...d5
        • 2.Qxd5#
      • 1...Bc4!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Rf4#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Bxf3
        • 2.Qxf3#
      • 1...d3
        • 2.Qc4#
      • 1...Bd3
        • 2.cxd3#
      • 1...Sbd6
        • 2.Sc5#
      • 1...Scd6
        • 2.Rxe7#
      • 1...d6
        • 2.Qe6#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::R1(C)
    • Q(a);CHECK,N_GUARD::R1(C),XQ(a)
    • Q(a);CHECK,XP(H)::S(J),XQ(a)
    • Q(a);N_GUARD,XP(A)::R1(C)
    • S(h);N_GUARD::S(E)
    • S(h);N_GUARD::S(E),XS(h)
    • S(k);N_GUARD::R(K),XP(j)
    • P(g);OGATE,XP(G)::B(D),XP(g)
    • P(j);OGATE::R1(K),XP(j)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(a);CHECK,N_GUARD::R1(C),XQ(a)
        • Q(a);CHECK,XP(H)::S(J),XQ(a)
        • B(c);N_GUARD,XR(C)::QAB1(B)
        • S(k);N_GUARD,XS(E)::R(K),XP(j)
        • P(i);::QAB1(B),XP(i)
      • Refutation
        • B(c);
  • Actual
    • B(D);
    • Threat
      • B(D)+R(C),DCHECK
    • Vars
      • Q(a);CHECK::B(D)+R(C),DCHECK,XQ(a)
      • Q(a);CHECK,XP(H)::S(J),XQ(a)
      • B(c);OGATE,P_SPINB(c),XR(C)::QAB1(B),XB(c)
      • P(e);OGATEB::QAR2(B)
      • B(c);OGATE::P(A),XB(c)
      • S(h);N_GUARD::S(E)
      • S(k);N_GUARD::R(K),XP(j)
      • P(i);N_GUARD::QAR2(B)
      • P(j);OGATE::R1(K),XP(j)
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