MESON Chess Problem Database
Problem Display
PID: 7611 (1q5n/pP2Q3/2pP2p1/3kP2b/KPRNpn2/1P3r2/3p2rB/1B6 w - - 0 1)
Rychkov, Vladimir Nikolaevich
4th HM., Sverdlovsk 31. Ty., 1992
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Qxd6
- 2.Qxd6#
- 1...Se2
- 2.Qe6#
- 1...Sd3
- 2.Qe6#
- 1...Sh3
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Qxd6
- Tries
- 1.Sc2?
- threat
- 2.Rd4#
- 2.Rc5#
- 1...Qxd6
- 2.Rd4#
- 2.Qxd6#
- 1...c5
- 2.Rxc5#
- 1...d1Q
- 2.Rc5#
- 1...d1R
- 2.Rc5#
- 1...Rc3
- 2.Rd4#
- 1...Rd3
- 2.Rc5#
- 1...Se2
- 2.Rc5#
- 1...Sd3
- 2.Rd4#
- 1...e3
- 2.Rd4#
- 1...Se6!
- threat
- 1.Se2?
- threat
- 2.Bxe4#
- 2.Rd4#
- 2.Rc5#
- 1...Qxd6
- 2.Bxe4#
- 2.Rd4#
- 2.Qxd6#
- 1...Rxb3
- 2.Rd4#
- 2.Rc5#
- 1...Sxe2
- 2.Bxe4#
- 1...c5
- 2.Bxe4#
- 2.Rxc5#
- 1...d1Q
- 2.Bxe4#
- 2.Rc5#
- 1...d1R
- 2.Bxe4#
- 2.Rc5#
- 1...Rc3
- 2.Sxc3#
- 2.Sxf4#
- 2.Bxe4#
- 2.Rd4#
- 1...Rd3
- 2.Sxf4#
- 2.Rc5#
- 1...Re3
- 2.Sxf4#
- 2.Rd4#
- 2.Rc5#
- 1...Sd3
- 2.Sc3#
- 2.Rd4#
- 1...Se6
- 2.Bxe4#
- 1...e3
- 2.Sc3#
- 2.Be4#
- 2.Rd4#
- 2.Rc5#
- 1...Rxe2!
- threat
- 1.Sxf3?
- threat
- 2.Bxe4#
- 2.Rd4#
- 2.Rc5#
- 1...Qxd6
- 2.Bxe4#
- 2.Rd4#
- 2.Qxd6#
- 1...exf3
- 2.Be4#
- 1...c5
- 2.Bxe4#
- 2.Rxc5#
- 1...d1Q
- 2.Bxe4#
- 2.Rc5#
- 1...d1R
- 2.Bxe4#
- 2.Rc5#
- 1...Re2
- 2.Rd4#
- 2.Rc5#
- 1...Se2
- 2.Bxe4#
- 2.Rc5#
- 1...Sd3
- 2.Rd4#
- 1...Se6
- 2.Bxe4#
- 1...e3
- 2.Be4#
- 2.Rd4#
- 2.Rc5#
- 1...Bxf3!
- threat
- 1.Sb5?
- threat
- 2.Bxe4#
- 2.Rd4#
- 2.Rc5#
- 1...Qxd6
- 2.Bxe4#
- 2.Rd4#
- 2.Qxd6#
- 1...Rxb3
- 2.Rd4#
- 2.Rc5#
- 1...c5
- 2.Bxe4#
- 2.Rxc5#
- 1...d1Q
- 2.Bxe4#
- 2.Rc5#
- 1...d1R
- 2.Bxe4#
- 2.Rc5#
- 1...Re2
- 2.Rd4#
- 2.Rc5#
- 1...Rc3
- 2.Sxc3#
- 2.Bxe4#
- 2.Rd4#
- 1...Rd3
- 2.Rc5#
- 1...Re3
- 2.Rd4#
- 2.Rc5#
- 1...Se2
- 2.Bxe4#
- 2.Rc5#
- 1...Sd3
- 2.Sc3#
- 2.Rd4#
- 1...Se6
- 2.Bxe4#
- 1...e3
- 2.Sc3#
- 2.Be4#
- 2.Rd4#
- 2.Rc5#
- 1...cxb5+!
- threat
- 1.Sf5?
- threat
- 2.Bxe4#
- 2.Rd4#
- 2.Rc5#
- 1...Qxd6
- 2.Bxe4#
- 2.Rd4#
- 2.Qxd6#
- 1...Rxb3
- 2.Rd4#
- 2.Rc5#
- 1...c5
- 2.Bxe4#
- 2.Rxc5#
- 1...d1Q
- 2.Bxe4#
- 2.Rc5#
- 1...d1R
- 2.Bxe4#
- 2.Rc5#
- 1...Re2
- 2.Rd4#
- 2.Rc5#
- 1...Rc3
- 2.Bxe4#
- 2.Rd4#
- 1...Rd3
- 2.Rc5#
- 1...Re3
- 2.Sxe3#
- 2.Rd4#
- 2.Rc5#
- 1...Se2
- 2.Bxe4#
- 2.Rc5#
- 1...Sd3
- 2.Rd4#
- 1...Se6
- 2.Bxe4#
- 1...e3
- 2.Be4#
- 2.Rd4#
- 2.Rc5#
- 1...gxf5!
- threat
- 1.Sxc6?
- threat
- 2.Bxe4#
- 2.Rc5#
- 1...Qxd6
- 2.Bxe4#
- 2.Qxd6#
- 1...Rxb3
- 2.Rc5#
- 1...Re2
- 2.Rc5#
- 1...Rc3
- 2.Bxe4#
- 1...Rd3
- 2.Rc5#
- 1...Re3
- 2.Rc5#
- 1...Se6
- 2.Bxe4#
- 1...e3
- 2.Be4#
- 2.Rc5#
- 1...Sd3!
- threat
- 1.Qf7+?
- 1...Kxe5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Sxf7!
- 1...Kxe5
- 1.d7?
- threat
- 2.Qc5#
- 1...Qd6
- 2.Qxd6#
- 1...Sd3
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...c5
- 2.Qxc5#
- 1...Qf8!
- threat
- 1.Sc2?
- Keys
- 1.Se6!
- threat
- 2.Rc5#
- 1...Kxe5
- 2.Rc5#
- 1...Qxd6
- 2.Qxd6#
- 1...Sxe6
- 2.Bxe4#
- 1...c5
- 2.Rxc5#
- 1...Rc3
- 2.Sxf4#
- 1...Sd3
- 2.Rd4#
- threat
- 1.Se6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- Q(k);OGATE,XP(I)::QAR1(K),XQ(k)
- S(e);N_GUARD::QAB1(K)
- S(e);N_GUARD::QAB1(K),XS(e)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- P(h);::R1(F),XP(h)
- P(a);::R1(F)
- R(c);::R1(F)
- S(e);::R1(F)
- P(d);::R1(F)
- Refutation
- S(e);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- S(e);XS(G)::B(A),XP(d)
- S(e);::B(A),XP(d)
- Refutation
- R(b);XS(G)
- Try
- S(G);XR(c)
- Threat
- DUALS(3)
- Vars
- P(d);XS(G)::B(A)
- S(e);::R1(F)
- S(e);::B(A),XP(d)
- Refutation
- B(g);XS(G)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(c);::R1(F)
- S(e);::B(A),XP(d)
- Refutation
- P(h);CHECK,XS(G)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(c);::R1(F)
- S(e);::R1(F)
- S(e);::B(A),XP(d)
- Refutation
- P(i);XS(G)
- Try
- S(G);XP(h)
- Threat
- DUALS(2)
- Vars
- R(c);XP(C)::R1(F)
- R(b);::R1(F)
- R(c);::B(A),XP(d)
- R(c);::R1(F)
- S(e);::B(A),XP(d)
- Refutation
- S(e);
- Try
- Q(K);CHECK
- Vars
- K(f);P-FLIGHT,P_SPINS(e),XP(H)::QAR1(K)
- S(e);N_GUARD,P_SPINS(e)::QAB1(K),XS(e)
- Refutation
- S(l);XQ(K)
- Try
- P(I);
- Threat
- QAR1(K)
- Vars
- Q(k);N_GUARD::QAR1(K),XQ(k)
- S(e);N_GUARD::QAB1(K)
- S(e);N_GUARD::QAB1(K),XS(e)
- P(h);::QAR1(K),XP(h)
- Refutation
- Q(k);
- Try
- Actual
- S(G);
- Threat
- R1(F)
- Vars
- K(f);P-FLIGHT,P_SPINS(e),XP(H)::R(F)
- Q(k);OGATE,XP(I)::QAR1(K),XQ(k)
- S(e);XS(G)::B(A),XP(d)
- P(h);::R1(F),XP(h)
- R(c);N_GUARD::S(G),XS(e)
- S(e);::R1(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).