MESON Chess Problem Database
Problem Display
PID: 10907 (q1Q5/bp1nBN2/b3PN1p/r6P/5kP1/2R1p2K/8/3R3B w - - 0 1)
Dombrovskis, Alfreds A
Loshinski, Lev Ilich
1st Prize, Stella Polaris, 1969
#2
11 + 9
| 3751 | FIDE Album (1968-1970) | 1977 |
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
| 702 | Phenix | 2009 |
| 56 | The Problemist | 2012 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sd5#
- 1...Ra2
- 2.Sd5#
- 1...Ra3
- 2.Sd5#
- 1...Ra4
- 2.Sd5#
- 1...Rb5
- 2.Rf1#
- 1...Rc5
- 2.Rd4#
- 1...Rd5
- 2.Sxd5#
- 1...Rxh5+
- 2.Sxh5#
- 1...Bf1+
- 2.Rxf1#
- 1...Bb5
- 2.Sd5#
- 1...Bd4
- 2.Rxd4#
- 1...Bc5
- 2.Sd5#
- 1...Bb8
- 2.Rd4#
- 1...Sc5
- 2.Sd5#
- 2.Bd6#
- 2.Qc7#
- 1...Sb6
- 2.Rd4#
- 1...e2
- 2.Rf3#
- 1...Ra1
- Tries
- 1.Bc5?
- threat
- 2.Sd5#
- 2.Rd4#
- 1...Bf1+
- 2.Rxf1#
- 1...Rxc5
- 2.Rd4#
- 1...Bxc5
- 2.Sd5#
- 1...Sxc5
- 2.Sd5#
- 2.Qc7#
- 1...Sxf6
- 2.Qc7#
- 1...Ra4
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bc4
- 2.Rd4#
- 2.Rxc4#
- 1...Sb6
- 2.Bxe3#
- 2.Rd4#
- 2.Qc7#
- 1...b6
- 2.Bxe3#
- 1...b5!
- threat
- 1.Bd6+?
- 1...Re5
- 2.Sd5#
- 1...Se5!
- 1...Re5
- 1.Rc4+?
- 1...Bd4
- 2.Rf1#
- 2.Rdxd4#
- 2.Rcxd4#
- 1...Bxc4!
- 1...Bd4
- 1.Rc5?
- threat
- 2.Sd5#
- 2.Rd4#
- 1...Bf1+
- 2.Rxf1#
- 1...Rxc5
- 2.Rd4#
- 1...Bxc5
- 2.Sd5#
- 1...Sxc5
- 2.Sd5#
- 2.Bd6#
- 2.Qc7#
- 1...Sxf6
- 2.Bd6#
- 2.Qc7#
- 1...e2
- 2.Sd5#
- 1...Ra4
- 2.Sd5#
- 2.Rf5#
- 1...Bd3
- 2.Sd5#
- 1...Bc4
- 2.Rd4#
- 1...Sb6
- 2.Bd6#
- 2.Rd4#
- 2.Qc7#
- 1...b5
- 2.Rf5#
- 1...b6!
- threat
- 1.Qc4+?
- 1...Bd4
- 2.Rf1#
- 2.Rxd4#
- 2.Qxd4#
- 1...Bxc4!
- 1...Bd4
- 1.Qc6?
- threat
- 2.Qf3#
- 2.Qe4#
- 1...Rxh5+
- 2.Sxh5#
- 1...Bf1+
- 2.Rxf1#
- 1...Sxf6
- 2.Qf3#
- 1...Se5
- 2.Qe4#
- 1...Ra4
- 2.Sd5#
- 2.Qf3#
- 1...Rd5
- 2.Sxd5#
- 1...Re5
- 2.Qf3#
- 1...Be2
- 2.Qe4#
- 1...Bd3
- 2.Qf3#
- 1...Sc5
- 2.Sd5#
- 2.Bd6#
- 2.Qf3#
- 2.Qd6#
- 2.Qc7#
- 1...b5
- 2.Sd5#
- 2.Rf1#
- 1...b6
- 2.Rd4#
- 1...bxc6!
- threat
- 1.Qc7+?
- 1...Re5
- 2.Sd5#
- 1...Se5!
- 1...Re5
- 1.Bc5?
- Keys
- 1.Qc5!
- threat
- 2.Sd5#
- 2.Rd4#
- 1...Bf1+
- 2.Rxf1#
- 1...Rxc5
- 2.Rd4#
- 1...Bxc5
- 2.Sd5#
- 1...Sxc5
- 2.Sd5#
- 2.Bd6#
- 1...Sxf6
- 2.Bd6#
- 1...Ra4
- 2.Sd5#
- 2.Qf5#
- 1...Bd3
- 2.Sd5#
- 1...Bc4
- 2.Rd4#
- 2.Rxc4#
- 1...Sb6
- 2.Bd6#
- 2.Rd4#
- 2.Qxe3#
- 2.Qd4#
- 1...b5
- 2.Qf5#
- 1...b6
- 2.Qxe3#
- threat
- 1.Qc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 12
- Sets
- R(c);N_GUARD::S(H)
- R(c);S_CUTB(d)::R(A)
- R(c);S_CUTB(f)::R(A)
- R(c);N_GUARD::S(H),XR(c)
- R(c);CHECK,XP(F)::S(H),XR(c)
- B(d);CHECK,N_GUARD::R(A),XB(d)
- B(d);S_CUTR(c)::S(H)
- B(f);N_GUARD::R(A),XB(f)
- B(f);S_CUTR(c)::S(H)
- B(f);N_GUARD::R(A)
- S(h);S_CUTB(f)::R(A)
- P(a);OGATE::R1(C)
- Tries
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD::R(A),XB(d)
- R(c);XB(I)::R(A)
- B(f);XB(I)::S(H)
- S(h);N_GUARD,XS(H)::QAB(K)
- R(c);::S(H)
- B(d);::S(H)
- P(g);S_CUTB(f)::B(I),XP(a)
- Refutation
- P(g);
- Try
- B(I);CHECK
- Vars
- R(c);P_SPINR(c)::S(H)
- Refutation
- S(h);P_SPINS(h)
- Try
- R(C);CHECK
- Refutation
- B(d);XR(C)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD::R(A),XB(d)
- R(c);XR(C)::R(A)
- B(f);XR(C)::S(H)
- P(a);::S(H)
- B(d);::S(H)
- B(d);::R(A)
- P(g);S_CUTR(c)::R1(C)
- Refutation
- P(g);
- Try
- Q(K);CHECK
- Refutation
- B(d);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,XP(F)::S(H),XR(c)
- B(d);CHECK,N_GUARD::R(A),XB(d)
- S(h);XS(H)::QAR1(K)
- S(h);::QAR1(K)
- R(c);N_GUARD::S(H),XR(c)
- R(c);::QAR1(K)
- B(d);::QAR1(K)
- P(g);S_CUTB(f)::R(A)
- Refutation
- P(g);XQ(K)
- Try
- Q(K);CHECK
- Vars
- R(c);P_SPINR(c)::S(H)
- Refutation
- S(h);P_SPINS(h)
- Try
- Actual
- Q(K);
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,N_GUARD::R(A),XB(d)
- R(c);XQ(K)::R(A)
- B(f);XQ(K)::S(H)
- S(h);N_GUARD,XS(H)::B(I)
- B(d);::S(H)
- P(g);S_CUTR(c)::QAR1(K)
- P(g);S_CUTB(f)::QAB1(K),XP(a)
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).