MESON Chess Problem Database
Problem Display
PID: 180273 (1b4Bn/rb4Pq/4PN1R/NnB1k3/2p1P3/2r2RP1/8/3Q2K1 w - - 0 1)
Lider, Valentin Viktorovich
2nd Prize, Shakhmaty (Riga) TT, 1961
#2
12 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Sd7#
- 1...Qf5
- 2.Rxf5#
- 1...Qxh6
- 2.Rf5#
- 1...Qxg7
- 2.Rf5#
- 1...Ra3
- 2.Sxc4#
- 1...Rb3
- 2.Sxc4#
- 1...Rd3
- 2.Sxc4#
- 1...Re3
- 2.Sxc4#
- 1...Rxf3
- 2.Sxc4#
- 1...Bxe4
- 2.Sg4#
- 1...Bd5
- 2.Qxd5#
- 1...Ba6
- 2.Sc6#
- 2.Qd5#
- 1...Bc6
- 2.Sxc6#
- 1...Bc8
- 2.Sc6#
- 2.Qd5#
- 1...Sa3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sd6
- 2.Bd4#
- 2.Qd4#
- 1...Sc7
- 2.Bd6#
- 2.Qd4#
- 2.Qd6#
- 1...Sg6
- 2.Rf5#
- 1...Qxe4
- Tries
- 1.Re3?
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4
- 2.Qh5#
- 1...Rxe3
- 2.Sxc4#
- 1...Bxe4
- 2.Qd5#
- 1...Qg6
- 2.Sd7#
- 1...Qf5
- 2.Sd7#
- 1...Rd3
- 2.Sxc4#
- 2.Sg4#
- 1...Bd5
- 2.Sg4#
- 2.Qxd5#
- 1...Ba6
- 2.Sc6#
- 2.Sg4#
- 2.Qd5#
- 1...Bc6
- 2.Sxc6#
- 2.Sg4#
- 1...Ba8
- 2.Sg4#
- 1...Bc8
- 2.Sc6#
- 2.Sg4#
- 2.Qd5#
- 1...Qxg7!
- threat
- 1.Rf4?
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxg7
- 2.Rf5#
- 1...Bxe4
- 2.Sg4#
- 1...Qf5
- 2.Sd7#
- 2.Rxf5#
- 1...Qg6
- 2.Sd7#
- 1...Rd3
- 2.Sxc4#
- 2.Sg4#
- 1...Bd5
- 2.Sg4#
- 2.Qxd5#
- 1...Ba6
- 2.Sc6#
- 2.Sg4#
- 2.Qd5#
- 1...Bc6
- 2.Sxc6#
- 2.Sg4#
- 1...Ba8
- 2.Sg4#
- 1...Bc8
- 2.Sc6#
- 2.Sg4#
- 2.Qd5#
- 1...Rxg3+!
- threat
- 1.Rh5+?
- 1...Qf5
- 2.Rfxf5#
- 2.Rhxf5#
- 1...Qxh5!
- 1...Qf5
- 1.Qe2?
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4
- 2.Rh5#
- 1...Qxg7
- 2.Rf5#
- 1...Bxe4
- 2.Sc6#
- 1...Qf5
- 2.Sd7#
- 2.Rxf5#
- 1...Qg6
- 2.Sd7#
- 1...Rd3
- 2.Sxc4#
- 2.Sg4#
- 1...Re3
- 2.Sxc4#
- 1...Bd5
- 2.Sg4#
- 1...Ba6
- 2.Sc6#
- 2.Sg4#
- 1...Bc6
- 2.Sxc6#
- 2.Sg4#
- 1...Ba8
- 2.Sg4#
- 1...Bc8
- 2.Sc6#
- 2.Sg4#
- 1...Rc1+!
- threat
- 1.Re3?
- Keys
- 1.Qe1!
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4
- 2.Rh5#
- 1...Qxg7
- 2.Rf5#
- 1...Bxe4
- 2.Sc6#
- 1...Qf5
- 2.Sd7#
- 2.Rxf5#
- 1...Qg6
- 2.Sd7#
- 1...Rd3
- 2.Sxc4#
- 2.Sg4#
- 1...Re3
- 2.Sxc4#
- 1...Bd5
- 2.Sg4#
- 1...Ba6
- 2.Sc6#
- 2.Sg4#
- 1...Bc6
- 2.Sxc6#
- 2.Sg4#
- 1...Ba8
- 2.Sg4#
- 1...Bc8
- 2.Sc6#
- 2.Sg4#
- threat
- 1.Qe1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(g);SBLOCK,XP(E)::S(I)
- Q(g);N_GUARD::R1(C),XQ(g)
- Q(g);N_GUARD,XR(J)::R1(C)
- Q(g);N_GUARD,P_PINP(D),XP(K)::R1(C)
- R(a);N_GUARD::S(F),XP(b)
- R(a);N_GUARD,XR(C)::S(F),XP(b)
- B(f);SBLOCK,XP(E)::S(I)
- B(f);N_GUARD::QAR1(A),XB(f)
- B(f);N_GUARD::S(F),XB(f)
- S(c);N_GUARD::QAB1(A)
- S(c);N_GUARD::QAB1(A),XS(c)
- S(i);S_CUTQ(g)::R1(C)
- Tries
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,P_SPINQ(g),XP(E)::QAR(A)
- R(a);N_GUARD,XR(C)::S(F),XP(b)
- B(f);N_GUARD,P_SPINB(f),XP(E)::QAR1(A)
- Q(g);P_PINP(D)::S(I)
- Q(g);::S(I)
- B(f);::S(I)
- Refutation
- Q(g);P_PINP(D),XP(K)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,P_PINP(D),XP(K)::R1(C)
- B(f);XP(E)::S(I)
- Q(g);P_PINP(D)::S(I)
- B(f);::S(I)
- Refutation
- R(a);CHECK,XP(D)
- Try
- R(J);CHECK
- Refutation
- Q(g);XR(J)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,P_SPINQ(g),XP(E)::R(J)
- Q(g);N_GUARD,P_PINP(D),XP(K)::R1(C)
- B(f);N_GUARD,P_SPINB(f),XP(E)::S(F)
- Q(g);P_PINP(D)::S(I)
- R(a);N_GUARD::S(F),XP(b)
- B(f);::S(I)
- Refutation
- R(a);CHECK
- Try
- Actual
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,P_SPINQ(g),XP(E)::R(J)
- Q(g);N_GUARD,P_PINP(D),XP(K)::R1(C)
- B(f);N_GUARD,P_SPINB(f),XP(E)::S(F)
- Q(g);P_PINP(D)::S(I)
- R(a);N_GUARD::S(F),XP(b)
- B(f);::S(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).