MESON Chess Problem Database
Problem Display
PID: 115658 (1b3q2/1r5B/2RBp3/3n4/r2k3N/N4Q2/3PR3/1b3K2 w - - 0 1)
Draiska, Imants
Padomju Jaunatne, 1949
#2
9 + 8
| 721 | Variantim | 1988 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qh6
- 2.Bc5#
- 1...Qg7
- 2.Bc5#
- 1...Qxf3+
- 2.Sxf3#
- 1...Qf4
- 2.Bc5#
- 1...Qf5
- 2.Bc5#
- 1...Qf6
- 2.Bc5#
- 1...Qf7
- 2.Bc5#
- 1...Qc8
- 2.Bc5#
- 1...Qd8
- 2.Bc5#
- 1...Qe8
- 2.Bc5#
- 1...Qg8
- 2.Bc5#
- 1...Qh8
- 2.Bc5#
- 1...Rc4
- 2.Rxc4#
- 1...Ra5
- 2.Rc4#
- 1...Ra6
- 2.Rc4#
- 1...Raa7
- 2.Rc4#
- 1...Ra8
- 2.Rc4#
- 1...Rb5
- 2.Sxb5#
- 1...Rba7
- 2.Sb5#
- 1...Rc7
- 2.Sb5#
- 2.Be5#
- 1...Rd7
- 2.Sb5#
- 1...Re7
- 2.Sb5#
- 2.Bc5#
- 1...Rf7
- 2.Sb5#
- 1...Rg7
- 2.Sb5#
- 1...Rxh7
- 2.Sb5#
- 1...Ba2
- 2.Sc2#
- 2.Re4#
- 1...Bc2
- 2.Sxc2#
- 1...Be4
- 2.Rxe4#
- 1...Ba7
- 2.Be5#
- 1...Sc3
- 2.dxc3#
- 1...Se3+
- 2.dxe3#
- 1...Sb4
- 2.Rc4#
- 1...Sb6
- 2.Sb5#
- 1...Sc7
- 2.Be5#
- 1...Se7
- 2.Bc5#
- 1...Qh6
- Tries
- 1.Bxb1?
- threat
- 2.Sc2#
- 2.Re4#
- 1...Qxf3+
- 2.Sxf3#
- 1...Se3+
- 2.dxe3#
- 1...Rxa3
- 2.Re4#
- 1...Qf4
- 2.Sc2#
- 2.Bc5#
- 1...Qf5
- 2.Bc5#
- 1...Rc4
- 2.Re4#
- 2.Rxc4#
- 1...Rb2
- 2.Re4#
- 1...Sc3
- 2.Sc2#
- 2.dxc3#
- 1...Sb4
- 2.Rc4#
- 1...Sf4
- 2.Sc2#
- 2.Qe4#
- 1...Sb6
- 2.Sc2#
- 2.Sb5#
- 1...Sf6
- 2.Sc2#
- 2.Qd3#
- 1...Sc7
- 2.Sc2#
- 2.Be5#
- 1...Se7
- 2.Sc2#
- 2.Bc5#
- 1...Rxb1+!
- threat
- 1.Rc2?
- threat
- 2.Re4#
- 1...Qxf3+
- 2.Sxf3#
- 1...Se3+
- 2.dxe3#
- 1...Qf4
- 2.Bc5#
- 1...Qf5
- 2.Bc5#
- 1...Sc3
- 2.dxc3#
- 1...Sb4
- 2.Rc4#
- 1...Sf4
- 2.Qe4#
- 1...Sb6
- 2.Sb5#
- 1...Sf6
- 2.Qd3#
- 1...Sc7
- 2.Be5#
- 1...Se7
- 2.Bc5#
- 1...Bxc2!
- threat
- 1.Bxb1?
- Keys
- 1.Bc2!
- threat
- 2.Re4#
- 1...Qxf3+
- 2.Sxf3#
- 1...Se3+
- 2.dxe3#
- 1...Bxc2
- 2.Sxc2#
- 1...Qf4
- 2.Bc5#
- 1...Qf5
- 2.Bc5#
- 1...Sc3
- 2.dxc3#
- 1...Sb4
- 2.Rc4#
- 1...Sf4
- 2.Qe4#
- 1...Sb6
- 2.Sb5#
- 1...Sf6
- 2.Qd3#
- 1...Sc7
- 2.Be5#
- 1...Se7
- 2.Bc5#
- threat
- 1.Bc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 22
- Sets
- Q(h);N_GUARD,N_PINQ(E)::B(H)
- Q(h);CHECK,XQ(E)::S(F),XQ(h)
- Q(h);N_GUARD::B(H)
- R(b);N_GUARD::R1(G),XR(b)
- R(b);N_GUARD::R1(G)
- R(f);N_GUARD::S(D),XR(f)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD,XB(I)::S(D)
- B(a);N_GUARD::S(D),XB(a)
- B(a);N_GUARD::R1(C),XB(a)
- B(g);N_GUARD::B(H)
- S(d);OGATE::P(B),XS(d)
- S(d);CHECK,OGATE::P(B),XS(d)
- S(d);S_CUTR(b)::R1(G)
- S(d);S_CUTR(f)::S(D)
- S(d);S_CUTB(g)::B(H)
- S(d);S_CUTQ(h)::B(H)
- Tries
- Try
- B(I);XB(a)
- Threat
- DUALS(2)
- Vars
- Q(h);CHECK,XQ(E)::S(F),XQ(h)
- S(d);CHECK,OGATE::P(B),XS(d)
- R(b);XS(D)::R1(C)
- Q(h);N_GUARD::B(H)
- R(f);::R1(C)
- S(d);S_CUTR(b)::R1(G)
- Refutation
- R(f);CHECK,XB(I)
- Try
- R(G);
- Threat
- R1(C)
- Vars
- Q(h);CHECK,XQ(E)::S(F),XQ(h)
- S(d);CHECK,OGATE::P(B),XS(d)
- Q(h);N_GUARD::B(H)
- S(d);OGATE::P(B),XS(d)
- S(d);S_CUTR(b)::R1(G)
- S(d);N_PINQ(E)::QAR1(E)
- S(d);S_CUTR(f)::S(D)
- S(d);S_CUTB(g)::B(H)
- S(d);S_CUTQ(h)::B(H)
- Refutation
- B(a);XR(G)
- Try
- Actual
- B(I);
- Threat
- R1(C)
- Vars
- Q(h);CHECK,XQ(E)::S(F),XQ(h)
- S(d);CHECK,OGATE::P(B),XS(d)
- B(a);XB(I)::S(D),XB(a)
- Q(h);N_GUARD::B(H)
- S(d);OGATE::P(B),XS(d)
- S(d);S_CUTR(b)::R1(G)
- S(d);N_PINQ(E)::QAR1(E)
- S(d);S_CUTR(f)::S(D)
- S(d);S_CUTB(g)::B(H)
- S(d);S_CUTQ(h)::B(H)
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).