MESON Chess Problem Database
Problem Display
PID: 162130 (8/B4Bb1/8/2rP1Q1K/1n1k1P2/N1n5/3P1N2/8 w - - 0 1)
Akobiya, Yuri
Source?, 1978
#2
9 + 5
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Scxd5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sbxd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Be5
- Tries
- 1.Kg4?
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Scxd5
- 1.Kh4?
- 1...Bf6+
- 2.Qxf6#
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Bf6+
- 1.Kg6?
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Scxd5
- 1.Sc2+?
- 1...Sxc2
- 2.Qd3#
- 1...Kc4!
- 1...Sxc2
- 1.Sb5+?
- 1...Sxb5
- 2.Qe4#
- 1...Kc4!
- 1...Sxb5
- 1.Bb6?
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Scxd5
- 1.Be6?
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Scxd5
- 1.Bg8?
- 1...Scxd5
- 2.Qe4#
- 1...Sbxd5
- 2.Qd3#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bh6
- 2.Qe5#
- 2.Qf6#
- 1...Bf8
- 2.Qe5#
- 2.Qf6#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sca2
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sba2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bh8!
- 1...Scxd5
- 1.Qc2?
- threat
- 2.Qxc3#
- 1...Scxd5
- 2.Sb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Sbxd5
- 2.Qd3#
- 1...Sb1
- 2.Sb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Sd1
- 2.Sb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Sca2
- 2.Sb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Se2
- 2.Sb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Sa4
- 2.Sb5#
- 2.Qe4#
- 2.Qc4#
- 1...Se4
- 2.Sb5#
- 2.Qxe4#
- 2.Qc4#
- 1...Sb5
- 2.Sxb5#
- 2.Bxc5#
- 2.Qe4#
- 2.Qc4#
- 2.Qxc5#
- 1...Sba2
- 2.Qd3#
- 1...Sxc2!
- threat
- 1.Kg4?
- Keys
- 1.d6!
- threat
- 2.Bxc5#
- 2.Qxc5#
- 1...Be5
- 2.Qxe5#
- 1...Sa4
- 2.Sb5#
- 1...Se4
- 2.Sb5#
- 1...Scd5
- 2.Qe4#
- 1...Sd3
- 2.Sc2#
- 1...Sbd5
- 2.Qd3#
- 1...Sa6
- 2.Sc2#
- threat
- 1.d6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- S(b);N_GUARD,XP(E)::QAR1(F)
- Tries
- Try
- K(G);S_FLIGHT
- Vars
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- K(G);P-FLIGHT
- Vars
- B(e);CHECK,N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- K(G);S_FLIGHT
- Vars
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- S(C);CHECK
- Vars
- S(b);XS(C)::QAR1(F)
- Refutation
- K(c);N_SPINR(d),P-FLIGHT
- Try
- S(C);CHECK
- Vars
- S(a);XS(C)::QAR1(F)
- Refutation
- K(c);N_SPINR(d),P-FLIGHT
- Try
- B(H);
- Vars
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- B(I);
- Vars
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- B(I);
- Vars
- S(a);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD,XP(E)::QAR1(F)
- B(e);N_GUARD::QAB1(F),XB(e)
- B(e);N_GUARD::QAB(F),XB(e)
- S(a);N_GUARD::QAR1(F)
- S(a);N_GUARD::QAR1(F),XS(a)
- S(b);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAR1(F),XS(b)
- Refutation
- B(e);
- Try
- Q(F);P_SPINP(E)
- Threat
- QAB1(F),XS(a)
- Vars
- S(b);N_GUARD,XP(E)::QAR1(F)
- S(b);N_GUARD::QAR1(F)
- Refutation
- S(b);XQ(F)
- Try
- Actual
- P(E);P_SPINQ(F)
- Threat
- DUALS(2)
- Vars
- B(e);N_GUARD,N_PINQ(F)::QAB1(F),XB(e)
- S(a);N_GUARD::S(C)
- S(a);N_PINQ(F)::QAR1(F)
- S(b);N_GUARD::S(C)
- S(b);N_PINQ(F)::QAR1(F)
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).