MESON Chess Problem Database
Problem Display
PID: 233449 (B5QB/8/8/5k2/r7/4b1P1/3NR1KN/3b4 w - - 0 1)
Makarenko, Petr Leontevich
Freie Presse, 1990
#2
8 + 4
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Be4#
- 2.Qg4#
- 1...Ra2
- 2.Be4#
- 2.Qg4#
- 1...Ra3
- 2.Be4#
- 2.Qg4#
- 1...Re4
- 2.Bxe4#
- 1...Rg4
- 2.Qxg4#
- 1...Ra5
- 2.Be4#
- 2.Qg4#
- 1...Ra6
- 2.Be4#
- 2.Qg4#
- 1...Ra7
- 2.Be4#
- 2.Qg4#
- 1...Rxa8
- 2.Qg4#
- 1...Bg1
- 2.Re5#
- 1...Bxd2
- 2.Re5#
- 1...Bf2
- 2.Re5#
- 1...Bd4
- 2.Be4#
- 2.Qg4#
- 1...Bf4
- 2.Qg4#
- 2.g4#
- 1...Bc5
- 2.Re5#
- 1...Bg5
- 2.Re5#
- 2.Qe6#
- 2.Qh7#
- 1...Bb6
- 2.Re5#
- 1...Bh6
- 2.Re5#
- 1...Ba7
- 2.Re5#
- 1...Ra1
- Tries
- 1.Sdf1?
- threat
- 2.Sxe3#
- 1...Rxa8
- 2.Qg4#
- 1...Ra3
- 2.Qg4#
- 1...Bc1
- 2.Re5#
- 1...Bg1
- 2.Re5#
- 1...Bd2
- 2.Re5#
- 1...Bf2
- 2.Re5#
- 1...Bd4
- 2.Be4#
- 2.Qg4#
- 1...Bf4
- 2.Qg4#
- 2.g4#
- 1...Bc5
- 2.Re5#
- 1...Bg5
- 2.Re5#
- 2.Qe6#
- 2.Qh7#
- 1...Bb6
- 2.Re5#
- 1...Bh6
- 2.Re5#
- 1...Ba7
- 2.Re5#
- 1...Re4!
- threat
- 1.Sdf3?
- threat
- 2.Qf7#
- 1...Rxa8
- 2.Qg4#
- 1...Ra6
- 2.Sh4#
- 2.Qg4#
- 1...Ra7
- 2.Sh4#
- 2.Qg4#
- 1...Bd4
- 2.Sh4#
- 2.Be4#
- 2.Qe6#
- 2.Qh7#
- 2.Qg4#
- 2.Qg5#
- 1...Bg5
- 2.Re5#
- 2.Qe6#
- 2.Qh7#
- 2.Qxg5#
- 1...Bb3!
- threat
- 1.Sc4?
- threat
- 2.Sxe3#
- 2.Sd6#
- 2.Qg4#
- 1...Rxa8
- 2.Sd6#
- 2.Qg4#
- 1...Bxe2
- 2.Sxe3#
- 2.Sd6#
- 1...Ra3
- 2.Sd6#
- 2.Qg4#
- 1...Ra6
- 2.Sxe3#
- 2.Qg4#
- 1...Bc1
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bg1
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bd2
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bf2
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bd4
- 2.Sd6#
- 2.Be4#
- 2.Qg4#
- 1...Bf4
- 2.Be4#
- 2.Qg4#
- 2.g4#
- 1...Bc5
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bg5
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qe6#
- 2.Qh7#
- 1...Bb6
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Bh6
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Ba7
- 2.Sd6#
- 2.Be4#
- 2.Re5#
- 2.Qg4#
- 1...Rxc4!
- threat
- 1.Se4?
- threat
- 2.Sd6#
- 2.Qf7#
- 2.Qg4#
- 1...Rxa8
- 2.Sd6#
- 2.Qg4#
- 1...Bxe2
- 2.Sd6#
- 2.Qf7#
- 1...Rd4
- 2.Qf7#
- 2.Qg4#
- 1...Ra6
- 2.Qg4#
- 1...Ra7
- 2.Sd6#
- 2.Qg4#
- 1...Bb3
- 2.Sd6#
- 2.Qg4#
- 1...Bd4
- 2.Sd6#
- 2.Qg4#
- 1...Bf4
- 2.Qf7#
- 2.Qg4#
- 2.g4#
- 1...Bc5
- 2.Qf7#
- 2.Qg4#
- 1...Bg5
- 2.Sd6#
- 1...Rxe4!
- threat
- 1.Bd5?
- threat
- 2.Be6#
- 1...Re4
- 2.Bxe4#
- 1...Ra6
- 2.Be4#
- 2.Qg4#
- 1...Bb3!
- threat
- 1.Rxe3?
- threat
- 2.Re5#
- 1...Re4
- 2.Bxe4#
- 1...Ra5
- 2.Be4#
- 1...Bf3+!
- threat
- 1.Qh7+?
- 1...Kg5
- 2.Sdf3#
- 1...Ke6!
- 1...Kg5
- 1.Qg7?
- threat
- 2.Qf6#
- 1...Ra6
- 2.Qg4#
- 1...Bd4
- 2.Qg4#
- 1...Bg5
- 2.Re5#
- 2.Qh7#
- 1...Ke6!
- threat
- 1.g4+?
- 1...Rxg4+
- 2.Qxg4#
- 1...Kf4!
- 1...Rxg4+
- 1.Sdf1?
- Keys
- 1.Shf1!
- threat
- 2.Sxe3#
- 1...Bxd2
- 2.Re5#
- 1...Bg5
- 2.Qe6#
- 1...Ra3
- 2.Be4#
- 1...Re4
- 2.Bxe4#
- 1...Bg1
- 2.Re5#
- 1...Bf2
- 2.Re5#
- 1...Bd4
- 2.Be4#
- 1...Bf4
- 2.g4#
- 1...Bc5
- 2.Re5#
- 1...Bb6
- 2.Re5#
- 1...Bh6
- 2.Re5#
- 1...Ba7
- 2.Re5#
- threat
- 1.Shf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- R(c);N_GUARD::B(F),XR(c)
- R(c);N_GUARD,P_PINP(E)::QAB1(G),XR(c)
- R(c);N_GUARD,XB(F)::QAB1(G)
- B(b);OGATE::R1(B)
- B(b);OGATE,XS(A)::R1(B)
- Tries
- Try
- S(A);
- Threat
- S(A),XB(b)
- Vars
- R(c);N_GUARD,XB(F)::QAB1(G)
- R(c);N_GUARD::QAB1(G)
- B(b);OGATE::R1(B)
- Refutation
- R(c);
- Try
- S(A);
- Threat
- QAR2(G)
- Vars
- R(c);N_GUARD,XB(F)::QAB1(G)
- Refutation
- B(a);
- Try
- S(A);
- Threat
- DUALS(3)
- Refutation
- R(c);XS(A)
- Try
- S(A);
- Threat
- DUALS(3)
- Vars
- R(c);::QAB1(G)
- B(b);::S(A)
- Refutation
- R(c);XS(A)
- Try
- B(F);
- Threat
- B(F)
- Vars
- R(c);N_GUARD::B(F),XR(c)
- Refutation
- B(a);
- Try
- R(B);XB(b)
- Threat
- R1(B)
- Vars
- R(c);N_GUARD::B(F),XR(c)
- R(c);N_GUARD::B(F)
- Refutation
- B(a);CHECK
- Try
- Q(G);CHECK
- Vars
- K(d);P-FLIGHT::S(A)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT
- Try
- Q(G);
- Threat
- QAR1(G)
- Vars
- R(c);N_GUARD::QAB1(G)
- B(b);S_CUTR(c)::QAB1(G)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT
- Try
- P(E);CHECK
- Vars
- R(c);CHECK,OGATE,XP(E)::QAB1(G),XR(c)
- Refutation
- K(d);P-FLIGHT
- Try
- Actual
- S(D);
- Threat
- S(D),XB(b)
- Vars
- B(b);OGATE,XS(A)::R1(B)
- B(b);SBLOCK::QAB1(G)
- R(c);N_GUARD::B(F)
- R(c);N_GUARD::B(F),XR(c)
- B(b);OGATE::R1(B)
- B(b);S_CUTR(c)::B(F)
- B(b);SBLOCK,S_CUTR(c)::P(E)
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).