MESON Chess Problem Database
Problem Display
PID: 258323 (3R4/1qP5/5bN1/R1P1p1pr/2k1NQ2/2P5/PnB1n2r/K3B3 w - - 0 1)
Mochalkin, Oleksandr Viktorovich
Shanshin, Valery Yurevich
1st Comm., Buletin Problemistic, 1991
#2
12 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Bb3#
- 1...Qd5
- 2.Sd6#
- 1...Qa6
- 2.Bb3#
- 1...Qc6
- 2.Bb3#
- 1...Qa8
- 2.Bb3#
- 1...Qc8
- 2.Bb3#
- 1...Qb3
- 2.Bxb3#
- 2.axb3#
- 1...Qa7
- 2.Bb3#
- 1...Qxc7
- 2.Bb3#
- 1...Be7
- 2.Sxe5#
- 1...Sd1
- 2.Bd3#
- 1...Sd3
- 2.Bxd3#
- 1...Sa4
- 2.Bd3#
- 1...Sxc3
- 2.Sd2#
- 1...Qxe4
- Tries
- 1.Sxf6+?
- 1...Qe4
- 2.Sxe5#
- 2.Bb3#
- 1...Sd4
- 2.Sxe5#
- 1...Sxf4
- 2.Sxe5#
- 1...exf4
- 2.Se5#
- 1...e4
- 2.Se5#
- 1...gxf4!
- 1...Qe4
- 1.Ra4+?
- 1...Qb4
- 2.Rxb4#
- 1...Sxa4
- 2.Bd3#
- 1...Kb5!
- 1...Qb4
- 1.Qd2?
- threat
- 2.Sd6#
- 1...Qxe4
- 2.Bb3#
- 1...Qxc7
- 2.Bb3#
- 2.Qd5#
- 1...Sxc3
- 2.Qxc3#
- 1...Qd5
- 2.Bb3#
- 2.Qxd5#
- 1...Qa6
- 2.Bb3#
- 2.Qd5#
- 1...Qc6
- 2.Bb3#
- 1...Qb5
- 2.Qd5#
- 1...Qb6
- 2.Qd5#
- 1...Be7
- 2.Sxe5#
- 1...Sd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Sd4!
- threat
- 1.Qf3?
- threat
- 2.Sd2#
- 2.Sd6#
- 1...Qxe4
- 2.Bb3#
- 1...Qxc7
- 2.Sd2#
- 2.Bb3#
- 1...Sxc3
- 2.Qxc3#
- 1...Sd4
- 2.Sd6#
- 1...Qd5
- 2.Bb3#
- 1...Qa6
- 2.Sd2#
- 2.Bb3#
- 1...Qc6
- 2.Sd2#
- 2.Bb3#
- 1...Qb6
- 2.Sd2#
- 1...Be7
- 2.Sd2#
- 2.Sxe5#
- 1...Sd3
- 2.Sd6#
- 2.Bxd3#
- 2.Qxd3#
- 1...Sc1
- 2.Sd6#
- 1...Sg1
- 2.Sd6#
- 1...Sg3
- 2.Sd6#
- 1...Sf4
- 2.Sd6#
- 1...Qb5!
- threat
- 1.c6?
- threat
- 2.Sd6#
- 2.Rc5#
- 1...Qxc6
- 2.Sd6#
- 2.Bb3#
- 1...Sxc3
- 2.Sd2#
- 2.Sd6#
- 1...Qb4
- 2.Sd6#
- 1...Qb6
- 2.Sd6#
- 1...Qa7
- 2.Sd6#
- 2.Bb3#
- 1...Be7
- 2.Sd6#
- 2.Sxe5#
- 2.Qf7#
- 1...Sd3
- 2.Sd6#
- 2.Bxd3#
- 1...Sa4
- 2.Sd6#
- 2.Bd3#
- 1...Qb5!
- threat
- 1.Sxf6+?
- Keys
- 1.Qxe5!
- threat
- 2.Sd2#
- 2.Sd6#
- 1...Qxe4
- 2.Bb3#
- 1...Qxc7
- 2.Sd2#
- 2.Bb3#
- 2.Qd5#
- 2.Qe6#
- 1...Bxe5
- 2.Sxe5#
- 1...Sxc3
- 2.Rd4#
- 1...Sd4
- 2.Sd6#
- 2.Rxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qa6
- 2.Sd2#
- 2.Bb3#
- 2.Qd5#
- 1...Qc6
- 2.Sd2#
- 2.Bb3#
- 1...Qb6
- 2.Sd2#
- 2.Qd5#
- 1...Be7
- 2.Sd2#
- 1...Sc1
- 2.Sd6#
- 2.Rd4#
- 1...Sg1
- 2.Sd6#
- 2.Rd4#
- 1...Sg3
- 2.Sd6#
- 2.Rd4#
- 1...Sf4
- 2.Sd6#
- 2.Rd4#
- threat
- 1.Qxe5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(i);N_GUARD,P_SPINQ(i),XS(F)::B(D)
- Q(i);SBLOCK::QAR(G)+S(F),DCHECK
- Q(i);N_GUARD::B(D)
- Q(i);N_GUARD,XP(K)::B(D)
- B(h);N_GUARD::S(J),XP(e)
- S(a);N_GUARD::B(D)
- S(a);N_GUARD::B(D),XS(a)
- S(b);SBLOCK,XP(E)::QAR(G)+S(F),DCHECK
- Tries
- Try
- S(F);CHECK,XB(h)
- Vars
- S(b);P_SPINS(b)::S(J),XP(e)
- S(b);XQ(G)::S(J),XP(e)
- P(e);XQ(G)::S(J)
- P(e);P_SPINP(e)::S(J)
- Refutation
- P(f);XQ(G)
- Try
- R(H);CHECK
- Vars
- Q(i);N_GUARD,P_SPINQ(i)::R1(H),XQ(i)
- S(a);XR(H)::B(D)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(G);
- Threat
- S(F)
- Vars
- Q(i);N_GUARD,XS(F)::B(D)
- S(b);OGATE,XP(E)::QAR1(G),XS(b)
- Q(i);N_GUARD::B(D)
- Q(i);N_GUARD::QAB1(G)
- B(h);N_GUARD::S(J),XP(e)
- Refutation
- S(b);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(i);N_GUARD,XS(F)::B(D)
- S(b);OGATE,XP(E)::QAR1(G),XS(b)
- S(b);::S(F)
- Q(i);N_GUARD::B(D)
- Q(i);::S(F)
- Refutation
- Q(i);
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(i);::QAR(G)+S(F),DCHECK
- Refutation
- Q(i);
- Try
- Actual
- Q(G);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(i);N_GUARD,XS(F)::B(D)
- B(h);XQ(G)::S(J),XB(h)
- S(b);N_GUARD,XP(E)::R1(L)
- Q(i);N_GUARD::QAB1(G),XQ(i)
- B(h);::S(F)
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).