MESON Chess Problem Database
Problem Display
PID: 273525 (4B3/KN2bQ2/p5r1/2pRP3/4k1pn/3p1NB1/3P1R2/5r2 w - - 0 1)
Petrov, Evgeny Aleksandrovich
diagrammes, 1978
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Sxc5#
- 1...Rf6
- 2.Sg5#
- 1...Bg5
- 2.Sxc5#
- 1...Bf6
- 2.Sd6#
- 1...Bd8
- 2.Sxc5#
- 1...c4
- 2.Rd4#
- 1...Rd6
- Tries
- 1.Sg5+?
- 1...Bxg5
- 2.Sxc5#
- 1...Rxg5!
- 1...Bxg5
- 1.Bc6?
- threat
- 2.Rd4#
- 2.Rd6#
- 2.Qf4#
- 1...Sxf3
- 2.Rd6#
- 2.Qxg6#
- 2.Qf4#
- 1...gxf3
- 2.Rd6#
- 2.Qf4#
- 1...Rf6
- 2.Sg5#
- 1...Bf6
- 2.Sd6#
- 1...Rd6
- 2.Sxc5#
- 2.Rd4#
- 2.Rxd6#
- 2.Qf4#
- 1...Bg5
- 2.Sxc5#
- 2.Rd4#
- 2.Rd6#
- 1...Bd6
- 2.Rd4#
- 2.Rxc5#
- 2.Rxd6#
- 2.Qf4#
- 1...Sg2
- 2.Rd4#
- 2.Rd6#
- 2.Qxg6#
- 1...Sf5
- 2.Rd4#
- 2.Rd6#
- 1...Rxc6!
- threat
- 1.Rxc5?
- threat
- 2.Rc4#
- 2.Qf4#
- 1...Bxc5+
- 2.Sxc5#
- 1...Sxf3
- 2.Qf4#
- 1...Bf6
- 2.Sd6#
- 1...Rc1
- 2.Qf4#
- 1...Rc6
- 2.Bxc6#
- 2.Qf4#
- 1...Rd6
- 2.Qf4#
- 1...Re6
- 2.Qf4#
- 1...Bg5
- 2.Rc4#
- 1...Sg2
- 2.Rc4#
- 2.Qxg6#
- 1...Sf5
- 2.Qd5#
- 1...Rf6!
- threat
- 1.Rd6?
- threat
- 2.Sxc5#
- 2.Bc6#
- 2.Qf4#
- 1...Rxd6
- 2.Sxc5#
- 1...Bxd6
- 2.Bc6#
- 1...Rf6
- 2.Sg5#
- 1...Rc1
- 2.Bc6#
- 2.Qf4#
- 1...Bg5
- 2.Sxc5#
- 2.Bc6#
- 1...Sg2
- 2.Sxc5#
- 2.Bc6#
- 2.Qxg6#
- 1...Sf5
- 2.Sxc5#
- 2.Bc6#
- 2.Qd5#
- 1...c4
- 2.Sc5#
- 2.Bc6#
- 2.Rd4#
- 2.Qf4#
- 1...Bf6!
- threat
- 1.Rd7?
- threat
- 2.Qf4#
- 1...Rf6
- 2.Sg5#
- 1...Bf6
- 2.Sd6#
- 1...Rd6
- 2.Sxc5#
- 1...Bg5
- 2.Sxc5#
- 1...Sg2
- 2.Qxg6#
- 1...Sf5
- 2.Qd5#
- 1...Bd6!
- threat
- 1.Sg5+?
- Keys
- 1.Rd8!
- threat
- 2.Qf4#
- 1...Bxd8
- 2.Sxc5#
- 1...Rf6
- 2.Sg5#
- 1...Bf6
- 2.Sd6#
- 1...Rd6
- 2.Sxc5#
- 1...Bg5
- 2.Sxc5#
- 1...Bd6
- 2.Bc6#
- 1...Sg2
- 2.Qxg6#
- 1...Sf5
- 2.Qd5#
- threat
- 1.Rd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(h);S_CUTB(i)::S(H),XP(f)
- R(h);N_GUARD,S_CUTB(i)::S(C)
- B(i);N_GUARD::S(H),XP(f)
- B(i);N_GUARD,S_CUTR(h)::S(H)
- P(f);N_GUARD::R1(E)
- Tries
- Try
- S(C);CHECK
- Vars
- B(i);XS(C)::S(H),XP(f)
- Refutation
- R(h);XS(C)
- Try
- B(J);
- Threat
- DUALS(3)
- Vars
- R(h);N_GUARD,S_CUTB(i)::S(C)
- B(i);N_GUARD,S_CUTR(h)::S(H)
- Refutation
- R(h);XB(J)
- Try
- R(E);XP(f)
- Threat
- DUALS(2)
- Vars
- B(i);CHECK,XR(E)::S(H),XB(i)
- S(e);XS(C)::QAR1(I)
- B(i);N_GUARD,S_CUTR(h)::S(H)
- R(a);::QAR1(I)
- R(h);::QAR1(I)
- B(i);::R(E)
- S(e);SBLOCK::QAB1(I)
- Refutation
- R(h);
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- R(h);XR(E)::S(H),XP(f)
- B(i);XR(E)::B(J)
- R(h);N_GUARD,S_CUTB(i)::S(C)
- Refutation
- B(i);
- Try
- R(E);
- Threat
- QAR1(I)
- Vars
- R(h);N_GUARD,S_CUTB(i)::S(C)
- B(i);N_GUARD,S_CUTR(h)::S(H)
- R(h);S_CUTB(i)::S(H),XP(f)
- B(i);N_GUARD::S(H),XP(f)
- S(e);N_GUARD::QAB(I),XR(h)
- S(e);SBLOCK::QAB1(I)
- Refutation
- B(i);
- Try
- Actual
- R(E);
- Threat
- QAR1(I)
- Vars
- B(i);N_GUARD,XR(E)::S(H),XP(f)
- R(h);N_GUARD,S_CUTB(i)::S(C)
- B(i);N_GUARD,S_CUTR(h)::S(H)
- R(h);S_CUTB(i)::S(H),XP(f)
- B(i);N_GUARD::S(H),XP(f)
- B(i);S_CUTR(h)::B(J)
- S(e);N_GUARD::QAB(I),XR(h)
- S(e);SBLOCK::QAB1(I)
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).