MESON Chess Problem Database
Problem Display
PID: 241128 (b7/5R1P/r2RN1p1/2qpk3/n1p3Qp/B4P1K/2N5/2b5 w - - 0 1)
Erokhin, Vladimir Alekseevich
Shakhmaty (Riga), 1973
#2
9 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.h8Q#
- 2.h8B#
- 1...Qf2
- 2.h8Q#
- 2.h8B#
- 1...Qe3
- 2.h8Q#
- 2.h8B#
- 1...Qd4
- 2.Qxd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb6
- 2.h8Q#
- 2.h8B#
- 1...Qxd6
- 2.h8Q#
- 2.h8B#
- 1...Qa7
- 2.h8Q#
- 2.h8B#
- 1...Qa5
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb5
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qc6
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qc7
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Qc8
- 2.Qd4#
- 1...Rxd6
- 2.h8Q#
- 2.h8B#
- 1...Bb2
- 2.Qf4#
- 1...Bxa3
- 2.Qf4#
- 1...Bf4
- 2.Qxf4#
- 1...Qg1
- Tries
- 1.Sxc5?
- threat
- 2.Sd7#
- 2.Qe6#
- 1...Kxd6
- 2.Qe6#
- 1...Rxd6
- 2.Qd4#
- 1...Bxa3
- 2.Qe6#
- 2.Qf4#
- 1...Ra7
- 2.Re6#
- 2.Qe6#
- 1...Bc6
- 2.Re6#
- 2.Qe6#
- 1...Sb6
- 2.Re6#
- 2.Qe6#
- 1...Sxc5!
- threat
- 1.Sc7?
- threat
- 2.Qe6#
- 1...Kxd6
- 2.Qe6#
- 1...Qxd6
- 2.Qd4#
- 1...Rxd6!
- threat
- 1.Sd8?
- threat
- 2.Qe6#
- 1...Kxd6
- 2.Qe6#
- 1...Qxd6
- 2.Qd4#
- 1...Qc8
- 2.h8Q#
- 2.h8B#
- 1...Rxd6!
- threat
- 1.Sf8?
- threat
- 2.Qe6#
- 1...Kxd6
- 2.Qe6#
- 1...Qxd6
- 2.Qd4#
- 1...Qc8
- 2.Sxg6#
- 2.h8Q#
- 2.h8B#
- 1...Rxd6!
- threat
- 1.Bxc5?
- threat
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Rxd6
- 2.Bd4#
- 2.h8Q#
- 2.h8B#
- 1...Ra5
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Rb6
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Rc6
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Ra7
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Bb2
- 2.Qf4#
- 2.Qg5#
- 2.h8Q#
- 2.h8B#
- 1...Bd2
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Ba3
- 2.Qd4#
- 2.Qf4#
- 2.Qg5#
- 2.h8Q#
- 2.h8B#
- 1...Be3
- 2.h8Q#
- 2.h8B#
- 1...Bf4
- 2.Qxf4#
- 2.h8Q#
- 2.h8B#
- 1...Bg5
- 2.Qd4#
- 2.Qxg5#
- 1...Bh6
- 2.Qd4#
- 1...Bc6
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Bb7
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sb2
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sc3
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sb6
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...c3
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...d4
- 2.Qxd4#
- 2.h8Q#
- 2.h8B#
- 1...g5
- 2.Rf5#
- 2.Qf5#
- 2.Qd4#
- 2.h8Q#
- 2.h8B#
- 1...Sxc5!
- threat
- 1.Qg3+?
- 1...Bf4
- 2.Qxf4#
- 1...hxg3!
- 1...Bf4
- 1.Qd4+?
- 1...Qxd4
- 2.h8Q#
- 2.h8B#
- 1...Kxd6!
- 1...Qxd4
- 1.Sxc5?
- Keys
- 1.Sf4!
- threat
- 2.Qe6#
- 1...Kxd6
- 2.Qe6#
- 1...Qxd6
- 2.Qg5#
- 1...Rxd6
- 2.Qg5#
- 1...Qc8
- 2.Sxg6#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(e);::P=Q
- Q(e);P_PINP(C)::P=Q
- Q(e);XR(F)::P=Q
- Q(e);N_GUARD::QAB1(E)
- R(h);SBLOCK,XR(F)::P=Q
- B(a);N_GUARD::QAB1(E)
- B(a);N_GUARD,XB(B)::QAB1(E)
- B(a);N_GUARD::QAB1(E),XB(a)
- Tries
- Try
- S(G);XQ(e)
- Threat
- DUALS(2)
- Vars
- K(g);S_FLIGHT,XR(F)::QAR1(E)
- R(h);SBLOCK,XR(F)::QAB1(E)
- Refutation
- S(b);XS(G)
- Try
- S(G);
- Threat
- QAR1(E)
- Vars
- K(g);P_SPINQ(e),S_FLIGHT,XR(F)::QAR1(E)
- Q(e);N_GUARD,XR(F)::QAB1(E)
- Refutation
- R(h);XR(F)
- Try
- S(G);
- Threat
- QAR1(E)
- Vars
- K(g);P_SPINQ(e),S_FLIGHT,XR(F)::QAR1(E)
- Q(e);N_GUARD,XR(F)::QAB1(E)
- Q(e);P_PINQ(E)::P=Q
- Refutation
- R(h);XR(F)
- Try
- S(G);
- Threat
- QAR1(E)
- Vars
- K(g);P_SPINQ(e),S_FLIGHT,XR(F)::QAR1(E)
- Q(e);N_GUARD,XR(F)::QAB1(E)
- Refutation
- R(h);XR(F)
- Try
- B(B);XQ(e)
- Threat
- DUALS(3)
- Vars
- B(a);::P=Q
- B(a);::QAB1(E)
- Refutation
- S(b);XB(B)
- Try
- Q(E);CHECK
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAB1(E),XB(a)
- Refutation
- P(d);XQ(E)
- Try
- Q(E);CHECK
- Vars
- Q(e);XQ(E)::P=Q
- Refutation
- K(g);P_SPINP(f),P_SPINQ(e),S_FLIGHT,XR(F)
- Try
- Actual
- S(G);
- Threat
- QAR1(E)
- Vars
- K(g);P_SPINQ(e),S_FLIGHT,XR(F)::QAR1(E)
- Q(e);XR(F)::QAR2(E)
- R(h);SBLOCK,XR(F)::QAR2(E)
- Q(e);P_PINQ(E)::S(G),XP(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).