MESON Chess Problem Database
Problem Display
PID: 110791 (N2nR3/8/n1Pk1p2/NQ6/2P1p2B/3r4/5PK1/8 w - - 0 1)
Lazarev, Yuri Archakovich
2nd Prize, Na Smenu!, 1960
#2
9 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Bg3#
- 1...Rd2
- 2.Bg3#
- 1...Ra3
- 2.Qd5#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rg3+
- 2.Bxg3#
- 1...Rh3
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb8#
- 1...Sc7
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Sxc6
- 2.Qxc6#
- 1...Se6
- 2.Sb7#
- 1...Sb7
- 2.Sxb7#
- 1...Sf7
- 2.Sb7#
- 1...e3
- 2.Bg3#
- 1...f5
- 2.Qe5#
- 1...Rd1
- Tries
- 1.Kf1?
- 1...Sxc6
- 2.Qxc6#
- 1...Rd2
- 2.Bg3#
- 1...Ra3
- 2.Qd5#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rg3
- 2.Bxg3#
- 2.Qd5#
- 1...Rh3
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb8#
- 1...Sc7
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Se6
- 2.Sb7#
- 1...Sb7
- 2.Sxb7#
- 1...Sf7
- 2.Sb7#
- 1...e3
- 2.Bg3#
- 1...f5
- 2.Qe5#
- 1...Rd1+!
- 1...Sxc6
- 1.Kg1?
- 1...Rg3+
- 2.Bxg3#
- 1...Sxc6
- 2.Qxc6#
- 1...Rd2
- 2.Bg3#
- 1...Ra3
- 2.Qd5#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rh3
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb8#
- 1...Sc7
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Se6
- 2.Sb7#
- 1...Sb7
- 2.Sxb7#
- 1...Sf7
- 2.Sb7#
- 1...e3
- 2.Bg3#
- 1...f5
- 2.Qe5#
- 1...Rd1+!
- 1...Rg3+
- 1.Kh2?
- 1...Sxc6
- 2.Qxc6#
- 1...Rd1
- 2.Bg3#
- 1...Rd2
- 2.Bg3#
- 1...Ra3
- 2.Qd5#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rg3
- 2.Bxg3#
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb8#
- 1...Sc7
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Se6
- 2.Sb7#
- 1...Sb7
- 2.Sxb7#
- 1...Sf7
- 2.Sb7#
- 1...e3
- 2.Bg3#
- 1...f5
- 2.Qe5#
- 1...Rh3+!
- 1...Sxc6
- 1.Bg5?
- threat
- 2.Bf4#
- 1...Sxc6
- 2.Qxc6#
- 1...fxg5
- 2.Qe5#
- 1...Rf3
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Se6
- 2.Sb7#
- 1...Sf7
- 2.Sb7#
- 1...Rg3+!
- threat
- 1.Bxf6?
- threat
- 2.Be5#
- 2.Qe5#
- 1...Sxc6
- 2.Qxc6#
- 1...Rd5
- 2.Qxd5#
- 1...Sc5
- 2.Be5#
- 2.Qb8#
- 1...Sf7
- 2.Sb7#
- 1...Rg3+!
- threat
- 1.Rxe4?
- 1...Rg3+
- 2.Bxg3#
- 1...Sxc6
- 2.Qxc6#
- 1...Ra3
- 2.Qd5#
- 1...Rd1
- 2.Bg3#
- 1...Rd2
- 2.Bg3#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rh3
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb8#
- 1...Sc7
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Sb7
- 2.Sxb7#
- 1...Sf7
- 2.Sb7#
- 1...f5
- 2.Be7#
- 2.Qe5#
- 1...Se6!
- 1...Rg3+
- 1.Qb4+?
- 1...Sc5
- 2.Qb8#
- 1...Sxb4!
- 1...Sc5
- 1.c5+?
- 1...Kd5
- 2.Qc4#
- 1...Sxc5!
- 1...Kd5
- 1.c7?
- threat
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rg3+
- 2.Bxg3#
- 1...Sc6
- 2.Qxc6#
- 1...Ra3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rd1
- 2.Bg3#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rd2
- 2.Bg3#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rb3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rc3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Re3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rf3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rh3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rd4
- 2.Bg3#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Rd5
- 2.Qxd5#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Sb4
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Sc5
- 2.c8S#
- 1...Sb8
- 2.cxb8Q#
- 2.cxb8B#
- 2.c8S#
- 1...Se6
- 2.Sb7#
- 2.c8S#
- 1...Sb7
- 2.Sxb7#
- 2.Qc6#
- 2.c8S#
- 1...Sf7
- 2.Sb7#
- 2.Qc6#
- 2.c8S#
- 1...e3
- 2.Bg3#
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...f5
- 2.cxd8Q#
- 2.cxd8R#
- 2.c8S#
- 1...Sxc7!
- threat
- 1.Kf1?
- Keys
- 1.Qf5!
- 1...Rg3+
- 2.Bxg3#
- 1...Sxc6
- 2.Sb7#
- 1...Rd5
- 2.Qxd5#
- 1...Ra3
- 2.Qd5#
- 1...Rd1
- 2.Bg3#
- 1...Rd2
- 2.Bg3#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rf3
- 2.Qd5#
- 1...Rh3
- 2.Qd5#
- 1...Rd4
- 2.Bg3#
- 1...Sb4
- 2.c5#
- 1...Sc5
- 2.Qf4#
- 1...Sc7
- 2.c5#
- 1...Sb8
- 2.c5#
- 1...Se6
- 2.Rxe6#
- 1...Sb7
- 2.Re6#
- 1...Sf7
- 2.Re6#
- 1...e3
- 2.Bg3#
- 1...Rg3+
- 1.Qf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(a);N_GUARD::B(D)
- R(a);N_GUARD,P_PINP(A)::B(D)
- R(a);N_GUARD::QAR1(F)
- R(a);CHECK,N_GUARD::B(D),XR(a)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(c);N_GUARD::QAB(F),XS(c)
- S(c);N_GUARD,SBLOCK::QAB(F)
- S(c);N_GUARD::QAB(F)
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- P(b);S_CUTR(a)::B(D)
- P(e);N_GUARD::QAB1(F)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- R(a);N_GUARD::B(D)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD,P_PINP(A)::QAR1(F)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(c);N_GUARD::QAB(F),XS(c)
- S(c);N_GUARD,SBLOCK::QAB(F)
- S(c);N_GUARD::QAB(F)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- P(b);S_CUTR(a)::B(D)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(a);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- R(a);CHECK,N_GUARD::B(D),XR(a)
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- R(a);N_GUARD::B(D)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(c);N_GUARD::QAB(F),XS(c)
- S(c);N_GUARD,SBLOCK::QAB(F)
- S(c);N_GUARD::QAB(F)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- P(b);S_CUTR(a)::B(D)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(a);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- R(a);N_GUARD::B(D)
- R(a);N_GUARD,P_PINP(A)::B(D)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(c);N_GUARD::QAB(F),XS(c)
- S(c);N_GUARD,SBLOCK::QAB(F)
- S(c);N_GUARD::QAB(F)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
- P(b);S_CUTR(a)::B(D)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(a);CHECK
- Try
- B(D);
- Threat
- B(D)
- Vars
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- P(e);N_GUARD,XB(D)::QAB1(F)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(f);N_GUARD::S(E)
- Refutation
- R(a);CHECK
- Try
- B(D);XP(e)
- Threat
- DUALS(2)
- Vars
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(f);N_GUARD::S(E)
- Refutation
- R(a);CHECK
- Try
- R(I);XP(b)
- Vars
- R(a);CHECK,N_GUARD::B(D),XR(a)
- S(f);OGATE,XP(G)::QAR1(F),XS(f)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD::B(D)
- R(a);N_GUARD,P_PINP(A)::B(D)
- R(a);N_GUARD::QAR1(F),XR(a)
- S(c);N_GUARD::QAB(F),XS(c)
- S(c);N_GUARD,SBLOCK::QAB(F)
- S(c);N_GUARD::QAB(F)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- Refutation
- S(f);
- Try
- Q(F);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c),SBLOCK::QAB(F)
- Refutation
- S(c);XQ(F)
- Try
- P(C);CHECK
- Vars
- K(d);P-FLIGHT::QAB1(F)
- Refutation
- S(c);XP(C)
- Try
- P(G);
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,N_GUARD::B(D),XR(a)
- S(f);N_GUARD::QAR1(F),XS(f)
- S(c);::P=S
- Refutation
- S(c);XP(G)
- Try
- Actual
- Q(F);
- Vars
- R(a);CHECK,N_GUARD::B(D),XR(a)
- S(f);N_GUARD,SBLOCK,XP(G)::S(E)
- R(a);N_GUARD::QAR1(F),XR(a)
- R(a);N_GUARD::QAR1(F)
- R(a);N_GUARD::B(D)
- R(a);N_GUARD,P_PINP(A)::B(D)
- S(c);N_GUARD::P(C)
- S(c);SBLOCK::QAB(F)
- S(f);N_GUARD::R1(I),XS(f)
- S(f);N_GUARD::R1(I)
- P(b);S_CUTR(a)::B(D)
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).