MESON Chess Problem Database
Problem Display
PID: 81624 (3qb3/1N2B3/6p1/b1nBk3/R1n3Qp/4N3/7K/4R3 w - - 0 1)
Popov, Valery
1st Prize, Zadachi i Etyudi, 2005
#2
8 + 8
| 145 | StrateGems | 2008 |
| 56 | The Problemist | 2008 |
| 23 | Die Schwalbe | 2012 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Sxc4#
- 1...Sb2
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd2
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sa3
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sxe3
- 2.Qg5#
- 1...Sb6
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd6
- 2.Qd4#
- 2.Qf4#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sxa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sxb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Qxd5
- Tries
- 1.Sc2+?
- 1...Bxe1
- 2.Qg5#
- 1...Se3
- 2.Qg5#
- 1...Se4
- 2.Qxe4#
- 2.Qg5#
- 1...Kxd5!
- 1...Bxe1
- 1.Sxc5?
- threat
- 2.Sd3#
- 2.Qe4#
- 1...Qxd5
- 2.Sxc4#
- 1...Sxe3
- 2.Qe6#
- 2.Qe4#
- 2.Qg5#
- 1...Sb2
- 2.Re4#
- 2.Qe6#
- 2.Qd4#
- 2.Qe4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd2
- 2.Sd3#
- 2.Qe6#
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd6
- 2.Sd3#
- 2.Qe6#
- 2.Qd4#
- 2.Qf4#
- 1...Qxe7!
- threat
- 1.Rd1?
- threat
- 2.Sxc4#
- 2.Qd4#
- 2.Qg5#
- 1...Qxe7
- 2.Qd4#
- 1...Qxd5
- 2.Rxd5#
- 1...Sxe3
- 2.Qf4#
- 1...Qd7
- 2.Sxc4#
- 2.Qd4#
- 1...Qc8
- 2.Sxc4#
- 2.Qd4#
- 1...Bc3
- 2.Sxc4#
- 2.Qg5#
- 1...Bb5
- 2.Qd4#
- 2.Qg5#
- 1...Bd7
- 2.Sxc4#
- 2.Qd4#
- 1...Sb2
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd2
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sa3
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sb6
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd6
- 2.Qd4#
- 2.Qf4#
- 1...Sb3
- 2.Sxc4#
- 2.Qe4#
- 2.Qg5#
- 1...Sd3
- 2.Qe4#
- 1...Se4
- 2.Sxc4#
- 2.Qxe4#
- 1...Se6
- 2.Sxc4#
- 2.Qe4#
- 1...g5
- 2.Sxc4#
- 2.Qf5#
- 2.Qd4#
- 2.Qxg5#
- 1...Bd2!
- threat
- 1.Rxc4?
- threat
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 1...Qxe7
- 2.Qd4#
- 2.Qf4#
- 1...Qd7
- 2.Qd4#
- 2.Qf4#
- 1...Qc8
- 2.Qd4#
- 2.Qf4#
- 1...Bc3
- 2.Qf4#
- 2.Qg5#
- 1...Bd7
- 2.Qd4#
- 2.Qf4#
- 1...Sb3
- 2.Re4#
- 2.Qe6#
- 2.Qe4#
- 2.Qf4#
- 2.Qg5#
- 1...Sd3
- 2.Re4#
- 2.Qe6#
- 2.Qd4#
- 2.Qe4#
- 2.Qg5#
- 1...Se4
- 2.Rxe4#
- 2.Qxe4#
- 1...Se6
- 2.Re4#
- 2.Qxe6#
- 2.Qe4#
- 1...g5
- 2.Qf5#
- 2.Qd4#
- 2.Qxg5#
- 1...Qxd5!
- threat
- 1.Qf5+?
- 1...Kd4
- 2.Rxc4#
- 1...gxf5!
- 1...Kd4
- 1.Sc2+?
- Keys
- 1.Rf1!
- threat
- 2.Qf4#
- 1...Qxd5
- 2.Bf6#
- 1...Sxe3
- 2.Qd4#
- 1...Se4
- 2.Qxe4#
- 1...Sd3
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...g5
- 2.Rf5#
- threat
- 1.Rf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- Q(g);SBLOCK,XB(F)::R(A)+S(C),DCHECK,XS(a)
- S(a);P_SPINS(a),XS(C)::QAR2(E)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD,XR(D)::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(d);N_GUARD,XS(G)::QAR1(E)
- Tries
- Try
- S(C);CHECK
- Vars
- B(c);XR(A)::QAR2(E)
- S(a);P_SPINS(a)::QAR2(E)
- Refutation
- K(e);P-FLIGHT,XB(F)
- Try
- S(G);XS(d)
- Threat
- DUALS(2)
- Vars
- Q(g);SBLOCK,XB(F)::R(A)+S(C),DCHECK,XS(a)
- Refutation
- Q(g);XB(H)
- Try
- R(A);
- Threat
- DUALS(3)
- Vars
- Q(g);XB(H)::QAB1(E)
- Q(g);OGATE,XB(F)::R1(A),XQ(g)
- S(a);XS(C)::QAB1(E)
- S(d);N_GUARD::QAR1(E)
- Refutation
- B(c);
- Try
- R(D);XS(a)
- Threat
- DUALS(3)
- Refutation
- Q(g);XB(F)
- Try
- Q(E);CHECK
- Vars
- K(e);P_SPINS(a),S_FLIGHT::R1(D),XS(a)
- Refutation
- P(f);XQ(E)
- Try
- Actual
- R(A);
- Threat
- QAB1(E)
- Vars
- Q(g);N_GUARD,XB(F)::B(H)
- S(a);XS(C)::QAB1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(d);N_GUARD::QAR1(E)
- P(f);N_GUARD::R1(A)
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).