MESON Chess Problem Database
Problem Display
PID: 243526 (8/1ppQ1K2/4NB1b/1R5r/p1k1N3/1q4R1/8/8 w - - 0 1)
Burda, Josef
Sachove umeni (Ceskoslovensky sach), 1991
#2
7 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rc3#
- 1...Qa2
- 2.Rc3#
- 2.Qd3#
- 1...Qb1
- 2.Rc3#
- 1...Qb2
- 2.Qd3#
- 1...Qc3
- 2.Rxc3#
- 1...Qd3
- 2.Qxd3#
- 1...Qb4
- 2.Qd3#
- 1...Qxb5
- 2.Qd4#
- 1...Rh1
- 2.Qd5#
- 1...Rh2
- 2.Qd5#
- 1...Rh3
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rxb5
- 2.Qd4#
- 1...Rd5
- 2.Qxd5#
- 1...Rg5
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Bg5
- 2.Qd5#
- 1...Bg7
- 2.Sd2#
- 1...Bf8
- 2.Sd2#
- 1...c6
- 2.Sd6#
- 1...Qd1
- Tries
- 1.Bg5?
- threat
- 2.Sd2#
- 2.Qd5#
- 1...Qxg3
- 2.Qd5#
- 1...Qxb5
- 2.Qd4#
- 1...Rxg5
- 2.Sd2#
- 1...Bxg5
- 2.Qd5#
- 1...c6
- 2.Sd6#
- 1...Qc2
- 2.Qd5#
- 1...Qd1
- 2.Rc3#
- 1...Qa2
- 2.Rc3#
- 2.Qd3#
- 2.Qd5#
- 1...Qb2
- 2.Qd3#
- 2.Qd5#
- 1...Qc3
- 2.Rxc3#
- 2.Qd5#
- 1...Qd3
- 2.Qxd3#
- 1...Qe3
- 2.Qd5#
- 1...Qb4
- 2.Qd3#
- 2.Qd5#
- 1...Rh2
- 2.Qd5#
- 1...c5
- 2.Sd2#
- 1...Qf3+!
- threat
- 1.Rgxb3?
- threat
- 2.Rc3#
- 2.R3b4#
- 2.R5b4#
- 2.Qd3#
- 2.Qd4#
- 1...Rxb5
- 2.Qxb5#
- 2.Qd3#
- 1...Rh3
- 2.R3b4#
- 2.R5b4#
- 2.Qd4#
- 2.Qd5#
- 2.Qxc7#
- 1...Rd5
- 2.Rc3#
- 2.R5b4#
- 2.Qxd5#
- 1...Bd2
- 2.Sxd2#
- 2.Qd3#
- 2.Qd4#
- 1...Be3
- 2.Rc3#
- 2.R3b4#
- 2.R5b4#
- 2.Qd3#
- 1...Bf8
- 2.Sd2#
- 2.Rc3#
- 2.Qd3#
- 2.Qd4#
- 1...c5
- 2.Rc3#
- 2.Qd3#
- 1...c6
- 2.Sd6#
- 2.R3b4#
- 2.R5b4#
- 2.Qd3#
- 2.Qd4#
- 1...axb3!
- threat
- 1.Rgg5?
- threat
- 2.Sd2#
- 2.Qd4#
- 2.Qd5#
- 1...Qxb5
- 2.Qxb5#
- 1...Rxg5
- 2.Sd2#
- 1...Bxg5
- 2.Qd5#
- 1...Qb4
- 2.Qd5#
- 1...Qc2
- 2.Qd4#
- 2.Qd5#
- 1...Qa2
- 2.Qd4#
- 2.Qd5#
- 1...Qb2
- 2.Qd5#
- 1...Qc3
- 2.Qd5#
- 1...Qd3
- 2.Qxc7#
- 1...Qe3
- 2.Qd5#
- 1...Rh2
- 2.Rgc5#
- 2.Qd4#
- 2.Qd5#
- 1...c5
- 2.Sd2#
- 1...c6
- 2.Sd2#
- 2.Qd4#
- 1...Qd1!
- threat
- 1.Rbxb3?
- threat
- 2.Rgc3#
- 2.Qd3#
- 2.Qd4#
- 1...Be3
- 2.Qd3#
- 1...Rh3
- 2.Qb5#
- 2.Qd3#
- 2.Qd4#
- 1...Rd5
- 2.Rgc3#
- 2.Qxa4#
- 1...Bd2
- 2.Sxd2#
- 2.Qd3#
- 2.Qd4#
- 1...c5
- 2.Rgc3#
- 2.Qd3#
- 1...axb3!
- threat
- 1.Rb4+?
- 1...Qxb4
- 2.Qd3#
- 1...Kxb4!
- 1...Qxb4
- 1.Qc6+?
- 1...Rc5
- 2.Qxc5#
- 1...bxc6!
- 1...Rc5
- 1.Qxc7+?
- 1...Rc5
- 2.Qxc5#
- 1...Kxb5!
- 1...Rc5
- 1.Bg5?
- Keys
- 1.S6g5!
- threat
- 2.Sd2#
- 2.Qd5#
- 1...Qxb5
- 2.Qd4#
- 1...Rxg5
- 2.Sd2#
- 1...Bxg5
- 2.Qd5#
- 1...c6
- 2.Sd6#
- 1...Qd1
- 2.Rc3#
- 1...Qa2
- 2.Rc3#
- 2.Qd3#
- 2.Qd5#
- 1...Qc2
- 2.Qd5#
- 1...Qb2
- 2.Qd3#
- 2.Qd5#
- 1...Qc3
- 2.Rxc3#
- 2.Qd5#
- 1...Qd3
- 2.Qxd3#
- 1...Qe3
- 2.Qd5#
- 1...Qb4
- 2.Qd3#
- 2.Qd5#
- 1...Rh2
- 2.Qd5#
- 1...c5
- 2.Sd2#
- threat
- 1.S6g5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::R1(A)
- Q(a);N_GUARD::QAB1(F)
- Q(a);N_GUARD::R1(A),XQ(a)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- Q(a);SBLOCK,XR(C)::QAR1(F)
- R(d);N_GUARD::QAB1(F)
- R(d);SBLOCK,XR(C)::QAR1(F)
- R(d);N_GUARD::QAB1(F),XR(d)
- R(d);S_CUTB(e)::S(B)
- B(e);N_GUARD::S(B),XB(e)
- B(e);S_CUTR(d)::QAB1(F)
- B(e);N_GUARD::S(B)
- P(g);N_GUARD::S(B)
- Tries
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- Q(a);XR(A)::QAB1(F)
- Q(a);SBLOCK,XR(C)::QAR1(F)
- R(d);XB(E)::S(B)
- B(e);XB(E)::QAB1(F)
- P(g);N_GUARD::S(B)
- Q(a);::QAB1(F)
- Q(a);N_GUARD::R1(A)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(d);::QAB1(F)
- P(g);::S(B)
- Refutation
- Q(a);CHECK
- Try
- R(A);XQ(a)
- Threat
- DUALS(5)
- Refutation
- P(b);XR(A)
- Try
- R(A);
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,XR(C)::QAB1(F),XQ(a)
- R(d);XR(A)::S(B)
- B(e);XR(A)::QAB1(F)
- Q(a);::QAB1(F)
- Q(a);SBLOCK::QAR(F),XP(g)
- P(g);::S(B)
- Refutation
- Q(a);
- Try
- R(C);XQ(a)
- Threat
- DUALS(3)
- Vars
- B(e);::QAB1(F)
- Refutation
- P(b);XR(C)
- Try
- R(C);CHECK
- Vars
- Q(a);SBLOCK,XR(C)::QAB1(F)
- Refutation
- K(c);P-FLIGHT,P_PINS(D),XR(C)
- Try
- Q(F);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAR1(F),XR(d)
- Refutation
- P(f);XQ(F)
- Try
- Q(F);CHECK,XP(g)
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAR1(F),XR(d)
- Refutation
- K(c);P_PINS(D),S_FLIGHT,XR(C)
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(a);SBLOCK,XR(C)::QAR1(F)
- R(d);XS(D)::S(B)
- B(e);XS(D)::QAB1(F)
- P(g);N_GUARD::S(B)
- Q(a);N_GUARD::R1(A)
- Q(a);::QAB1(F)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(d);::QAB1(F)
- P(g);::S(B)
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).