MESON Chess Problem Database

Problem Display
PID: 135827 (3Q4/8/3B4/p4N2/P2NpP2/1n6/1pp1p3/nrrbk1K1 w - - 0 1)

Hirschenson, Aaron

4th Place, Liga Problemista, 2009/1

3Q4/8/3B4/p4N2/P2NpP2/1n6/1pp1p3/nrrbk1K1

#2

7 + 11

273 Mat Plus 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qh4#
    • 1...Sxd4
      • 2.Qxa5#
    • 1...Sc5
      • 2.Qxa5#
    • 1...e3
      • 2.Sf3#
  • Tries
    • 1.Kg2?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Kd2!
    • 1.Sb5?
      • 1...Kd2
        • 2.Bb4#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sd4
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qxa5#
      • 1...e3!
    • 1.Sc6?
      • 1...Kd2
        • 2.Bb4#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sd4
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qxa5#
      • 1...e3!
    • 1.Se6?
      • 1...Kd2
        • 2.Bb4#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sd4
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qxa5#
      • 1...e3!
    • 1.Se3?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...Sd2
        • 2.Sg2#
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Sh4?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sdf3#
        • 2.Shf3#
      • 1...Sd2
        • 2.Sg2#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Sh6?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Sg7?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Ba3?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Bb4+?
      • 1...Sd2
        • 2.Qh4#
      • 1...axb4!
    • 1.Bc5?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...Sxc5
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Kd2!
    • 1.Bc7?
      • 1...Sxd4
        • 2.Bxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Bxa5#
      • 1...Kd2!
    • 1.Be7?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Bh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Bb8?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Bf8?
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#
      • 1...Kd2!
    • 1.Qxa5+?
      • 1...Sxa5
        • 2.Bb4#
      • 1...Sd2!
  • Keys
    • 1.Be5!
      • 1...Kd2
        • 2.Sf3#
      • 1...Sxd4
        • 2.Qxa5#
      • 1...e3
        • 2.Sf3#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sc5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(i);SBLOCK::QAB(G)
    • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
    • S(i);N_GUARD::QAB(G),XP(k)
    • P(j);N_GUARD::S(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(e);S_FLIGHT::QAR(G)+B(F),DCHECK
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • P(j);
    • Try
      • S(C);
      • Vars
        • K(e);S_FLIGHT::QAR(G)+B(F),DCHECK
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • P(j);
    • Try
      • S(C);
      • Vars
        • K(e);S_FLIGHT::QAR(G)+B(F),DCHECK
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • P(j);
    • Try
      • S(E);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • S(i);SBLOCK::S(E)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • S(i);P_SPINS(i)::QAB(G)
      • Refutation
        • P(k);XB(F)
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • S(i);N_GUARD,XB(F)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::B(F),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::B(F),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::B(F)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
        • P(j);N_GUARD::S(C)
        • S(i);SBLOCK::QAB(G)
        • S(i);N_GUARD::QAB(G),XP(k)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);CHECK,XP(k)
      • Vars
        • S(i);N_GUARD,XQ(G)::B(F)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • B(F);
    • Vars
      • K(e);S_FLIGHT::QAR(G)+S(C),DCHECK
      • S(i);N_GUARD,XS(C)::QAB(G),XP(k)
      • P(j);N_GUARD::S(C)
      • S(i);SBLOCK::QAB(G)
      • S(i);N_GUARD::QAB(G),XP(k)
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