MESON Chess Problem Database
Problem Display
PID: 18788 (NN6/8/B1p5/pnk1n3/P1PR2p1/3p1pB1/1Q1P1K2/8 w - - 0 1)
Draiska, Imants
1st Prize, Konkurs Estonskoi, 1958
#2
10 + 8
| 3976 | FIDE Album (1956-1958) | 1961 |
SOLUTION
- SOUND
- Sets
- 1...Sa3
- 2.Qb6#
- 1...Sc3
- 2.Qb6#
- 1...Sxd4
- 2.Qa3#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sxc4
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...Sa3
- Tries
- 1.Ke1?
- 1...Sxd4
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...f2+!
- 1...Sxd4
- 1.Kf1?
- 1...Sxd4
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...f2!
- 1...Sxd4
- 1.Kg1?
- 1...Sxd4
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...f2+!
- 1...Sxd4
- 1.Bh2?
- 1...Sxd4
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...g3+!
- 1...Sxd4
- 1.Bf4?
- 1...Sxd4
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...g3+!
- 1...Sxd4
- 1.Bh4?
- 1...Sxd4
- 2.Be7#
- 2.Qa3#
- 1...Sxc4
- 2.Sd7#
- 1...Sc3
- 2.Qb6#
- 1...Sa3
- 2.Be7#
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sa7
- 2.Be7#
- 2.Qb6#
- 1...Sc7
- 2.Be7#
- 2.Qb6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...g3+!
- 1...Sxd4
- 1.Bb7?
- threat
- 2.Sa6#
- 1...Sc3
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sxd4!
- threat
- 1.Bc8?
- threat
- 2.Sa6#
- 1...Sc3
- 2.Qb6#
- 1...Sc7
- 2.Qb6#
- 1...Sxd4!
- threat
- 1.Re4?
- 1...Kd6
- 2.Qxe5#
- 1...Sa3
- 2.Qxa3#
- 1...Sc3
- 2.Qa3#
- 1...Sd4
- 2.Qa3#
- 1...Sd6
- 2.Rxe5#
- 2.Qa3#
- 2.Qb6#
- 1...Sa7
- 2.Qa3#
- 1...Sc7
- 2.Qa3#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf7
- 2.Sd7#
- 1...Sxc4!
- 1...Kd6
- 1.Rd5+?
- 1...Kxc4
- 2.Sb6#
- 1...cxd5!
- 1...Kxc4
- 1.Qxb5+?
- 1...Kxd4
- 2.Qxe5#
- 1...cxb5!
- 1...Kxd4
- 1.cxb5?
- 1...Sg6
- 2.Sd7#
- 2.Bd6#
- 2.Qc3#
- 1...Sc4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 2.Bd6#
- 2.Qc3#
- 1...Sf7
- 2.Sd7#
- 2.Qc3#
- 1...cxb5!
- 1...Sg6
- 1.Ke1?
- Keys
- 1.Rd6!
- 1...Kxc4
- 2.Qc3#
- 1...Kxd6
- 2.Qxe5#
- 1...Sxd6
- 2.Qb6#
- 1...Sxc4
- 2.Sd7#
- 1...Sa3
- 2.Qxa3#
- 1...Sc3
- 2.Qa3#
- 1...Sd4
- 2.Qa3#
- 1...Sa7
- 2.Qa3#
- 1...Sc7
- 2.Qa3#
- 1...Sg6
- 2.Rxc6#
- 1...Sd7
- 2.Rxc6#
- 1...Sf7
- 2.Rxc6#
- 1...Kxc4
- 1.Rd6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(e);OGATE::QAB1(A)
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(b);CHECK
- Try
- K(C);P-FLIGHT
- Vars
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(b);
- Try
- K(C);S_FLIGHT
- Vars
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(b);CHECK
- Try
- B(D);
- Vars
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(c);CHECK
- Try
- B(D);
- Vars
- S(e);N_GUARD,SBLOCK,XR(G)::QAB(A)
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(c);CHECK
- Try
- B(D);
- Vars
- S(g);N_GUARD,XP(F)::S(J)
- S(e);OGATE::QAB1(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- P(c);CHECK
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(e);OGATE::QAB1(A)
- Refutation
- S(e);XR(G)
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(e);OGATE::QAB1(A)
- Refutation
- S(e);XR(G)
- Try
- R(G);
- Vars
- K(f);P_SPINS(g),S_FLIGHT::QAB1(A),XS(g)
- S(e);N_GUARD::QAB(A),XS(e)
- S(e);N_GUARD::QAB(A)
- S(g);N_GUARD::S(J)
- S(g);N_GUARD::S(J),XS(g)
- Refutation
- S(g);XP(F)
- Try
- R(G);CHECK
- Vars
- K(f);P-FLIGHT,P_SPINS(e),XP(F)::S(I)
- Refutation
- P(h);XR(G)
- Try
- Q(A);CHECK,XS(e)
- Vars
- K(f);OGATE,S_FLIGHT,XR(G)::QAB1(A),XS(g)
- Refutation
- P(h);XQ(A)
- Try
- P(F);XS(e)
- Vars
- S(g);N_GUARD::S(J)
- Refutation
- P(h);XP(F)
- Try
- Actual
- R(G);
- Vars
- K(f);OGATEB,P-FLIGHT,P_SPINS(e),XP(F)::QAR1(A)
- K(f);P_SPINS(g),S_FLIGHT,XR(G)::QAB1(A),XS(g)
- S(e);OGATE,SBLOCK,XR(G)::QAB1(A)
- S(g);N_GUARD,SBLOCK,XP(F)::S(J)
- S(e);N_GUARD::QAB(A),XS(e)
- S(e);N_GUARD::QAB(A)
- S(g);N_GUARD::R1(G),XP(h)
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).