MESON Chess Problem Database
Problem Display
PID: 180048 (8/1p6/1n4p1/4pbp1/1KQ1pkP1/4NBp1/6P1/3N4 w - - 0 1)
Russ, Colin Albert Harry
Problem Observer, 2012
#2
7 + 9
SOLUTION
- SOUND
- Sets
- 1...Bxg4
- 2.Qxe4#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sxc4
- 2.Sd5#
- 1...Sd5+
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Bxg4
- Tries
- 1.Ka3?
- 1...Bxg4
- 2.Qxe4#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Sxc4+!
- 1...Bxg4
- 1.Kb3?
- 1...Bxg4
- 2.Qxe4#
- 1...Sxc4
- 2.Sd5#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Be6!
- 1...Bxg4
- 1.Kc3?
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Qxe4#
- 1...Sxc4
- 2.Sd5#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Sa4+!
- 1...Sd5+
- 1.Ka5?
- 1...Bxg4
- 2.Qxe4#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Sxc4+!
- 1...Bxg4
- 1.Kb5?
- 1...Bxg4
- 2.Qxe4#
- 1...Sxc4
- 2.Sd5#
- 1...Be6
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Bd7+!
- 1...Bxg4
- 1.Sb2?
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Qxe4#
- 1...Sxc4
- 2.Sd5#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...Kxe3!
- 1...Sd5+
- 1.Sc3?
- 1...Sd5+
- 2.Scxd5#
- 2.Sexd5#
- 1...Bxg4
- 2.Qxe4#
- 1...Sxc4
- 2.Scd5#
- 2.Sed5#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Scd5#
- 2.Sed5#
- 1...Sd7
- 2.Scd5#
- 2.Sed5#
- 1...Sa8
- 2.Scd5#
- 2.Sed5#
- 1...Sc8
- 2.Scd5#
- 2.Sed5#
- 1...Kxe3!
- 1...Sd5+
- 1.Qf7?
- 1...Sd5+
- 2.Sxd5#
- 1...Sa4
- 2.Sd5#
- 1...Sc4
- 2.Sd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...exf3!
- 1...Sd5+
- 1.Qc2?
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Qxe4#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sc4
- 2.Sd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...exf3!
- 1...Sd5+
- 1.Qd4?
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Qxe4#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sc4
- 2.Sd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...exd4!
- 1...Sd5+
- 1.Qc6?
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Qxe4#
- 1...exf3
- 2.Qxf3#
- 1...Be6
- 2.Qxe4#
- 1...Bd7
- 2.Qxe4#
- 1...Bc8
- 2.Qxe4#
- 1...Sa4
- 2.Sd5#
- 1...Sc4
- 2.Sd5#
- 1...Sd7
- 2.Sd5#
- 1...Sa8
- 2.Sd5#
- 1...Sc8
- 2.Sd5#
- 1...bxc6!
- 1...Sd5+
- 1.Ka3?
- Keys
- 1.Qf1!
- threat
- 2.Be2#
- 1...Sd5+
- 2.Sxd5#
- 1...Bxg4
- 2.Bxg4#
- 1...exf3
- 2.Qxf3#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- S(g);N_GUARD,N_SPINP(b),XQ(F)::S(C)
- S(g);CHECK,N_GUARD::S(C),XS(g)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- S(g);N_GUARD::S(C),XS(g)
- Refutation
- S(g);CHECK,N_SPINP(b),XQ(F)
- Try
- K(E);P-FLIGHT
- Vars
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- S(g);N_GUARD,N_SPINP(b),XQ(F)::S(C)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- S(g);N_GUARD::S(C),XS(g)
- Refutation
- B(e);P_PINQ(F)
- Try
- K(E);S_FLIGHT
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- S(g);N_GUARD,N_SPINP(b),XQ(F)::S(C)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- Refutation
- S(g);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- S(g);N_GUARD::S(C),XS(g)
- Refutation
- S(g);CHECK,N_SPINP(b),XQ(F)
- Try
- K(E);P-FLIGHT
- Vars
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- S(g);N_GUARD,N_SPINP(b),XQ(F)::S(C)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- S(g);N_GUARD::S(C),XS(g)
- Refutation
- B(e);CHECK
- Try
- S(A);
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- S(g);N_GUARD,N_SPINP(b),XQ(F)::S(C)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT,XS(C)
- Try
- S(A);
- Vars
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT,XS(C)
- Try
- Q(F);N_PINP(b),P_PINB(e)
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- S(g);N_GUARD::S(C)
- Refutation
- P(b);XB(D)
- Try
- Q(F);N_PINP(b)
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- Refutation
- P(b);XB(D)
- Try
- Q(F);
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- Refutation
- P(d);N_SPINP(b),XQ(F)
- Try
- Q(F);N_PINP(b)
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);N_GUARD,XP(G)::QAR1(F),XP(b)
- P(b);OGATE,XB(D)::QAR1(F),XP(b)
- B(e);N_GUARD::QAR1(F),XP(b)
- S(g);N_GUARD::S(C)
- Refutation
- P(i);XQ(F)
- Try
- Actual
- Q(F);N_PINP(b)
- Threat
- QAR(F)+B(D)
- Vars
- S(g);CHECK,N_GUARD::S(C),XS(g)
- B(e);OGATE,XP(G)::QAR(F)+B(D),XB(e)
- P(b);OGATE,P_SPINP(b),XB(D)::QAR1(F),XP(b)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).