MESON Chess Problem Database
Problem Display
PID: 235099 (6B1/Bprp3P/Q3b3/2Pk1n2/2NP1q1R/2Rp1P2/K1N2n2/8 w - - 0 1)
Shanshin, Valery Yurevich
1st Prize, ChessStar, 2017
#2
12 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sb4#
- 1...Qh2
- 2.Sb4#
- 1...Qe3
- 2.Sb4#
- 1...Qg3
- 2.Sb4#
- 1...Qe5
- 2.Sb4#
- 1...Qg5
- 2.Sb4#
- 1...Qd6
- 2.Sb4#
- 1...Qh6
- 2.Sb4#
- 1...Qxf3
- 2.Sb4#
- 1...Qxd4
- 2.Sb4#
- 1...Bf7
- 2.Bxf7#
- 1...Bxg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sxd4
- 2.Sb4#
- 1...Qc1
- Tries
- 1.S4e3+?
- 1...Qxe3
- 2.Sb4#
- 1...Sxe3!
- 1...Qxe3
- 1.Rxf4?
- threat
- 2.Sb4#
- 2.Rxf5#
- 1...Sxd4
- 2.S2e3#
- 2.Sb4#
- 2.Rxd4#
- 2.Qd6#
- 1...bxa6
- 2.Sb4#
- 1...b6
- 2.Sb4#
- 1...Se4
- 2.Rxf5#
- 2.fxe4#
- 1...Sg4
- 2.Sb4#
- 1...Se3
- 2.S2xe3#
- 2.Sb4#
- 2.S4xe3#
- 2.Qd6#
- 1...Sg3
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qd6#
- 1...Sh4
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qd6#
- 1...Sd6
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qxd6#
- 1...Sh6
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qd6#
- 1...Se7
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qd6#
- 1...Sg7
- 2.S2e3#
- 2.Sb4#
- 2.S4e3#
- 2.Qd6#
- 1...dxc2!
- threat
- 1.Qb5?
- threat
- 2.Sb6#
- 2.c6#
- 1...Qxd4
- 2.Sb4#
- 1...Rxc5
- 2.Qxc5#
- 1...Bxg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sxd4
- 2.Sb4#
- 1...dxc2
- 2.c6#
- 1...Bf7
- 2.Bxf7#
- 1...Qd6
- 2.Sb4#
- 1...Se4
- 2.Sb6#
- 1...Sd6
- 2.Sb6#
- 1...b6
- 2.Sxb6#
- 2.c6#
- 1...Rc6!
- threat
- 1.Qxb7+?
- 1...Rc6
- 2.Sb6#
- 1...Rxb7!
- 1...Rc6
- 1.Qd6+?
- 1...Qxd6
- 2.Sb4#
- 1...Sxd6!
- 1...Qxd6
- 1.S4e3+?
- Keys
- 1.c6!
- threat
- 2.Sb4#
- 2.Qb5#
- 1...Qxd4
- 2.Sb4#
- 1...Rxc6
- 2.Sb4#
- 1...Bxg8
- 2.hxg8Q#
- 2.hxg8B#
- 1...Sxd4
- 2.Sb4#
- 1...dxc2
- 2.Qb5#
- 1...bxa6
- 2.Sb4#
- 1...bxc6
- 2.Sb4#
- 1...dxc6
- 2.Sb4#
- 1...Bf7
- 2.Bxf7#
- 1...b6
- 2.Qb5#
- 1...Qd2
- 2.Qb5#
- 1...Qd6
- 2.Sb6#
- 1...Se4
- 2.Sb4#
- 1...Sd6
- 2.Sb4#
- 2.Sb6#
- 1...b5
- 2.Sb4#
- 2.Qxb5#
- threat
- 1.c6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 8
- Sets
- Q(c);::S(B)
- Q(c);XP(D)::S(B)
- Q(c);XP(F)::S(B)
- B(f);OGATEB::B(L),XB(f)
- B(f);N_SPINB(f),OGATE,XB(L)::PXB(f)=Q
- S(e);SBLOCK,XP(F)::S(B)
- Tries
- Try
- S(E);CHECK
- Vars
- Q(c);XS(E)::S(B)
- Refutation
- S(e);XS(E)
- Try
- R(G);XQ(c)
- Threat
- DUALS(2)
- Vars
- P(g);XQ(I)::S(B)
- P(g);::S(B)
- S(a);::S(B)
- Refutation
- P(b);XS(B)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(F)::S(B)
- R(h);OGATE,P_SPINR(h),XP(H)::QAR1(I),XR(h)
- B(f);N_SPINB(f),OGATE,XB(L)::PXB(f)=Q
- S(e);SBLOCK,XP(F)::S(B)
- P(b);XS(B)::QAR(I)+P(H)
- B(f);OGATEB::B(L),XB(f)
- Q(c);::S(B)
- S(a);::S(E)
- S(e);::S(E)
- Refutation
- R(h);
- Try
- Q(I);CHECK,XP(g)
- Vars
- R(h);P_SPINR(h)::S(E)
- Refutation
- R(h);XQ(I)
- Try
- Q(I);CHECK
- Vars
- Q(c);XQ(I)::S(B)
- Refutation
- S(e);XQ(I)
- Try
- Actual
- P(H);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(F)::S(B)
- R(h);XP(H)::S(B)
- B(f);N_SPINB(f),OGATE,XB(L)::PXB(f)=Q
- S(e);XP(F)::S(B)
- P(b);XS(B)::QAR2(I)
- P(g);XQ(I)::S(B)
- P(g);XP(H)::S(B)
- P(i);XP(H)::S(B)
- B(f);OGATEB::B(L),XB(f)
- P(g);::QAR2(I)
- Q(c);P_PINS(B)::QAR2(I)
- Q(c);SBLOCK::S(E)
- S(a);::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).