MESON Chess Problem Database
Problem Display
PID: 110136 (8/4r3/2RN1nN1/1pn2B2/4p2r/3k3p/2R3b1/1K4BQ w - - 0 1)
Chistyakov, Aleksandr N
Kudesnik, 1991
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf4
- 2.Sxf4#
- 1...Rh5
- 2.Sf4#
- 1...Rh6
- 2.Sf4#
- 1...Rhh7
- 2.Sf4#
- 1...Rh8
- 2.Sf4#
- 1...Re5
- 2.Sxe5#
- 1...Ra7
- 2.Se5#
- 1...Rb7
- 2.Se5#
- 1...Rc7
- 2.Se5#
- 1...Rd7
- 2.Se5#
- 1...Rf7
- 2.Se5#
- 1...Rg7
- 2.Se5#
- 1...Reh7
- 2.Se5#
- 1...Bf1
- 2.Qf3#
- 1...Bf3
- 2.Qxf3#
- 1...Sb3
- 2.R6c3#
- 1...Sa6
- 2.R6c3#
- 1...Se6
- 2.Se5#
- 2.R6c3#
- 1...Sb7
- 2.R6c3#
- 1...Scd7
- 2.R6c3#
- 1...Sg4
- 2.Sf4#
- 1...Rf4
- Tries
- 1.Sb7?
- threat
- 2.Sxc5#
- 1...Rxb7
- 2.Se5#
- 1...Sxb7
- 2.R6c3#
- 1...Re5
- 2.Sxe5#
- 1...Sb3
- 2.R6c3#
- 1...Sa6
- 2.R6c3#
- 1...Se6
- 2.Se5#
- 2.R6c3#
- 1...Scd7
- 2.R6c3#
- 1...Sfd7
- 2.Rd6#
- 1...Sa4!
- threat
- 1.Bf2?
- threat
- 2.Qd1#
- 1...Bf1
- 2.Qf3#
- 2.Qxf1#
- 1...Bf3
- 2.Qxf3#
- 1...Sb3
- 2.R6c3#
- 1...Bxh1!
- threat
- 1.Bxc5?
- threat
- 2.Qd1#
- 1...Bf1
- 2.Qf3#
- 2.Qxf1#
- 1...Bf3
- 2.Qxf3#
- 1...Bxh1!
- threat
- 1.R6xc5?
- threat
- 2.R5c3#
- 1...Rc7
- 2.Se5#
- 1...Sd5
- 2.Rxd5#
- 1...b4!
- threat
- 1.Qxg2?
- threat
- 2.Qf1#
- 2.Qf3#
- 2.Qd2#
- 2.Qe2#
- 2.Qg3#
- 1...Rf4
- 2.Sxf4#
- 2.Qd2#
- 2.Qe2#
- 1...Rg4
- 2.Qf1#
- 2.Qf3#
- 2.Qd2#
- 2.Qe2#
- 1...Sb3
- 2.R2c3#
- 2.R6c3#
- 2.Qf1#
- 2.Qf3#
- 2.Qe2#
- 2.Qg3#
- 1...Sg4
- 2.Sf4#
- 2.Qf1#
- 2.Qd2#
- 2.Qe2#
- 1...Sd5
- 2.Qf1#
- 2.Qd2#
- 2.Qe2#
- 1...Sh5
- 2.Qf1#
- 2.Qf3#
- 2.Qd2#
- 2.Qe2#
- 1...hxg2!
- threat
- 1.Qxh3+?
- 1...Rxh3
- 2.Sf4#
- 1...Bf3
- 2.Qxf3#
- 1...Bxh3!
- 1...Rxh3
- 1.Sb7?
- Keys
- 1.Sxe4!
- threat
- 2.Sxc5#
- 1...Rhxe4
- 2.Sf4#
- 1...Rexe4
- 2.Se5#
- 1...Bxe4
- 2.Qf3#
- 1...Scxe4
- 2.R6c3#
- 1...Sfxe4
- 2.Rd6#
- 1...Sb3
- 2.Sc5#
- 2.R6c3#
- 1...Sa4
- 2.Sc5#
- 2.Rd2#
- 1...Sa6
- 2.Sc5#
- 2.Rd2#
- 2.R6c3#
- 1...Se6
- 2.Sc5#
- 2.Se5#
- 2.Rd2#
- 2.R6c3#
- 1...Sb7
- 2.Sc5#
- 2.Rd2#
- 2.R6c3#
- 1...Scd7
- 2.Sc5#
- 2.Rd2#
- 2.R6c3#
- threat
- 1.Sxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 20
- Sets
- R(e);N_GUARD::S(H),XR(e)
- R(e);N_GUARD::S(H)
- R(i);N_GUARD::S(H),XR(i)
- R(i);N_GUARD::S(H)
- B(a);OGATE::QAR2(C)
- B(a);OGATE::QAR2(C),XB(a)
- S(g);OGATE::R1(F)
- S(h);S_CUTR(e)::S(H)
- Tries
- Try
- S(G);
- Threat
- S(G),XS(g)
- Vars
- R(i);N_GUARD,XS(G)::S(H)
- S(g);OGATE,XS(G)::R1(F)
- R(i);N_GUARD::S(H),XR(i)
- S(g);OGATE::R1(F)
- S(h);N_GUARD::R(F)
- Refutation
- S(g);
- Try
- B(B);
- Threat
- QAR2(C)
- Vars
- B(a);OGATE::QAR2(C),XB(a)
- S(g);OGATE::R1(F)
- Refutation
- B(a);XQ(C)
- Try
- B(B);XS(g)
- Threat
- QAR2(C)
- Vars
- B(a);OGATE::QAR2(C),XB(a)
- Refutation
- B(a);XQ(C)
- Try
- R(F);XS(g)
- Threat
- R1(F)
- Vars
- R(i);N_GUARD::S(H)
- S(h);N_GUARD::R(F),XS(h)
- Refutation
- P(f);
- Try
- Q(C);XB(a)
- Threat
- DUALS(5)
- Refutation
- P(c);XQ(C)
- Try
- Q(C);CHECK,XP(c)
- Vars
- R(e);XQ(C)::S(H)
- B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
- Refutation
- B(a);XQ(C)
- Try
- Actual
- S(G);XP(d)
- Threat
- B(E)+S(G),DCHECK,XS(g)
- Vars
- R(e);N_GUARD,P_SPINR(e),XS(G)::S(H)
- R(i);N_GUARD,P_SPINR(i),XS(G)::S(H)
- B(a);OGATE,P_SPINB(a),XS(G)::QAR2(C)
- S(g);OGATE,P_SPINS(g),XS(G)::R1(F)
- S(h);N_GUARD,P_SPINS(h),XS(G)::R(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).