MESON Chess Problem Database
Problem Display
PID: 140285 (5n2/b4Q2/r2p2p1/3Bk3/3N4/p3Bb1r/3K1P2/8 w - - 0 1)
Keirans, Arturs
Shakhmaty v SSSR, 1949
#2
6 + 9
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Sxf3#
- 1...Rh2
- 2.Sxf3#
- 1...Rh4
- 2.Sxf3#
- 1...Rh5
- 2.Sxf3#
- 1...Rh6
- 2.Sxf3#
- 1...Rh7
- 2.Sxf3#
- 1...Rh8
- 2.Sxf3#
- 1...Ra4
- 2.Sc6#
- 1...Ra5
- 2.Sc6#
- 1...Rc6
- 2.Sxc6#
- 1...Bd1
- 2.f4#
- 1...Bh1
- 2.f4#
- 1...Be2
- 2.f4#
- 1...Bg2
- 2.f4#
- 1...Be4
- 2.f4#
- 1...Bg4
- 2.f4#
- 1...Bxd5
- 2.Qf4#
- 1...Bh5
- 2.f4#
- 1...Bxd4
- 2.Bf4#
- 1...Bb6
- 2.Sc6#
- 1...Se6
- 2.Qxe6#
- 1...Sd7
- 2.Qe6#
- 1...Sh7
- 2.Qe6#
- 1...g5
- 2.Qf5#
- 1...Rh1
- Tries
- 1.Ba2?
- threat
- 2.Qf4#
- 1...Ke4
- 2.Qd5#
- 2.Qf4#
- 1...Se6
- 2.Qxe6#
- 1...g5
- 2.Qf5#
- 1...Rh4!
- threat
- 1.Bb3?
- threat
- 2.Qf4#
- 1...Ke4
- 2.Qd5#
- 2.Qf4#
- 1...Se6
- 2.Qxe6#
- 1...g5
- 2.Qf5#
- 1...Rh4!
- threat
- 1.Bxf3?
- threat
- 2.Qf4#
- 2.Qg7#
- 1...Bxd4
- 2.Bf4#
- 1...d5
- 2.Qf4#
- 1...Rh4
- 2.Qg7#
- 1...Rh7
- 2.Qf4#
- 1...Se6
- 2.Qxe6#
- 1...Sd7
- 2.Qe6#
- 2.Qf4#
- 2.Qe7#
- 1...Sh7
- 2.Qe6#
- 2.Qf4#
- 2.Qe7#
- 1...g5
- 2.Qf5#
- 2.Qg7#
- 1...Rxf3!
- threat
- 1.Bc4?
- threat
- 2.Qf4#
- 1...Ke4
- 2.Qd5#
- 2.Qf4#
- 1...Se6
- 2.Qxe6#
- 1...g5
- 2.Qf5#
- 1...Rh4!
- threat
- 1.Qe7+?
- 1...Se6
- 2.Qxe6#
- 1...Kxd5!
- 1...Se6
- 1.Ba2?
- Keys
- 1.Kc3!
- threat
- 2.Bf4#
- 1...Rc6+
- 2.Sxc6#
- 1...Bxd4+
- 2.Bxd4#
- 1...Bxd5
- 2.Qf4#
- 1...Se6
- 2.Qxe6#
- 1...Rh4
- 2.Sxf3#
- 1...Bd1
- 2.f4#
- 1...Bh1
- 2.f4#
- 1...Be2
- 2.f4#
- 1...Bg2
- 2.f4#
- 1...Be4
- 2.f4#
- 1...Bg4
- 2.f4#
- 1...Bh5
- 2.f4#
- 1...g5
- 2.Qf5#
- threat
- 1.Kc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 11
- Sets
- R(c);N_GUARD::S(D),XB(b)
- R(c);N_GUARD,P_PINP(B)::S(D),XB(b)
- R(e);N_GUARD::S(D)
- R(e);N_GUARD::S(D),XR(e)
- B(b);OGATE::P(B)
- B(b);SBLOCK,XB(E)::QAB1(F)
- B(h);SBLOCK,XS(D)::B(C)
- B(h);S_CUTR(e)::S(D)
- S(i);N_GUARD::QAR1(F),XS(i)
- S(i);N_GUARD::QAR1(F)
- P(g);N_GUARD::QAR1(F)
- Tries
- Try
- B(E);
- Threat
- QAB1(F)
- Vars
- S(i);N_GUARD::QAR1(F),XS(i)
- P(g);N_GUARD::QAR1(F)
- Refutation
- R(c);
- Try
- B(E);
- Threat
- QAB1(F)
- Vars
- S(i);N_GUARD::QAR1(F),XS(i)
- P(g);N_GUARD::QAR1(F)
- Refutation
- R(c);
- Try
- B(E);XB(b)
- Threat
- DUALS(2)
- Vars
- B(h);SBLOCK,XS(D)::B(C)
- P(f);::QAB1(F)
- R(c);::QAB(F)
- R(c);::QAB1(F)
- S(i);N_GUARD::QAR1(F),XS(i)
- Refutation
- R(c);XB(E)
- Try
- B(E);
- Threat
- QAB1(F)
- Vars
- S(i);N_GUARD::QAR1(F),XS(i)
- P(g);N_GUARD::QAR1(F)
- Refutation
- R(c);
- Try
- Q(F);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::QAR1(F),XS(i)
- Refutation
- K(d);P-FLIGHT,XB(E)
- Try
- Actual
- K(A);S_FLIGHT
- Threat
- B(C)
- Vars
- R(e);CHECK,N_GUARD::S(D),XR(e)
- B(h);CHECK,OGATE,XS(D)::B(C),XB(h)
- B(b);P_PINB(C),SBLOCK,XB(E)::QAB1(F)
- S(i);N_GUARD::QAR1(F),XS(i)
- R(c);N_GUARD::S(D),XB(b)
- B(b);OGATE,P_PINB(C)::P(B)
- P(g);N_GUARD::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).