MESON Chess Problem Database
Problem Display
PID: 54909 (2B5/P1pr4/Rn3B1p/2Pkb3/Np1PNR2/1K6/3PQ3/8 w - - 0 1)
Bedoni, Romeo
1st Prize, Blikeng-80 JT, 1993-1994
#2
12 + 7
| 4640 | Chess Wizardry: The New ABC of Chess Problems | 1996 |
| 721 | Variantim | 2005 |
| 6352 | A Collection of Chess Problems by Touw Hian Bwee | 2008 |
| 136 | Problem Observer | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Kxd4
- 2.Sec3#
- 1...Kc6
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...Sxa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sa8
- 2.Qc4#
- 1...Sxc8
- 2.Qc4#
- 1...Kxd4
- Tries
- 1.Sac3+?
- 1...Kxd4
- 2.Qe3#
- 1...Kc6
- 2.Qb5#
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...bxc3!
- 1...Kxd4
- 1.Sxb6+?
- 1...Kxd4
- 2.Qc4#
- 2.Qe3#
- 1...Kc6
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...cxb6!
- 1...Kxd4
- 1.Sf2?
- 1...Kc6
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...Bxd4
- 2.Qe4#
- 1...Bxf4
- 2.Qe4#
- 1...Bxf6
- 2.Qe4#
- 1...Sxa4
- 2.Qf3#
- 2.Qc4#
- 2.Qe4#
- 2.Qxe5#
- 1...Sxc8
- 2.Qf3#
- 2.Qc4#
- 2.Qe4#
- 2.Qxe5#
- 1...Rd6
- 2.Qf3#
- 2.Qe4#
- 1...Re7
- 2.Qf3#
- 2.Qe4#
- 1...Rf7
- 2.Qf3#
- 2.Qe4#
- 1...Rg7
- 2.Qf3#
- 2.Qe4#
- 1...Rh7
- 2.Qf3#
- 2.Qe4#
- 1...Rd8
- 2.Qf3#
- 2.Qe4#
- 1...Bd6
- 2.Qe4#
- 1...Sc4
- 2.Qf3#
- 2.Qxc4#
- 2.Qe4#
- 1...Sa8
- 2.Qf3#
- 2.Qc4#
- 2.Qe4#
- 2.Qxe5#
- 1...c6
- 2.Qxe5#
- 1...h5!
- 1...Kc6
- 1.Sec3+?
- 1...Kc6
- 2.Qb5#
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...bxc3!
- 1...Kc6
- 1.Sg3?
- 1...Kc6
- 2.a8Q#
- 2.a8B#
- 1...Ke6
- 2.Qc4#
- 1...Bxd4
- 2.Qe4#
- 1...Bxf4
- 2.Qe4#
- 1...Bxf6
- 2.Qe4#
- 1...Sxa4
- 2.Qf3#
- 2.Qc4#
- 2.Qg2#
- 2.Qe4#
- 2.Qxe5#
- 1...Sxc8
- 2.Qf3#
- 2.Qc4#
- 2.Qg2#
- 2.Qe4#
- 2.Qxe5#
- 1...Rd6
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Re7
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Rf7
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Rg7
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Rh7
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Rd8
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Bd6
- 2.Qe4#
- 1...Sc4
- 2.Qf3#
- 2.Qxc4#
- 2.Qg2#
- 2.Qe4#
- 1...Sa8
- 2.Qf3#
- 2.Qc4#
- 2.Qg2#
- 2.Qe4#
- 2.Qxe5#
- 1...c6
- 2.Qxe5#
- 1...h5!
- 1...Kc6
- 1.Sg5?
- threat
- 2.Qf3#
- 2.Qg2#
- 2.Qe4#
- 1...Kc6
- 2.a8Q#
- 2.a8B#
- 1...hxg5!
- threat
- 1.Qf3?
- threat
- 2.Sg5#
- 1...Kxd4
- 2.Sf2#
- 2.Sec3#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 1...Kc6
- 2.Sd6#
- 1...Ke6!
- threat
- 1.Qc4+?
- 1...Kc6
- 2.cxb6#
- 2.a8Q#
- 2.a8B#
- 1...Sxc4!
- 1...Kc6
- 1.a8Q+?
- 1...Kxd4
- 2.Sf2#
- 2.Sec3#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Qe3#
- 1...Ke6
- 2.Qc4#
- 1...Sxa8
- 2.Qc4#
- 1...c6!
- 1...Kxd4
- 1.a8B+?
- 1...Kxd4
- 2.Sf2#
- 2.Sec3#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Qe3#
- 1...Ke6
- 2.Qc4#
- 1...Sxa8
- 2.Qc4#
- 1...c6!
- 1...Kxd4
- 1.Sac3+?
- Keys
- 1.Qg2!
- threat
- 2.Sg5#
- 1...Kxd4
- 2.Sf2#
- 1...Kc6
- 2.Sd6#
- 1...Ke6
- 2.Qg8#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- K(b);P-FLIGHT,P_SPINB(c),XP(E)::R(G)+S(F)
- K(b);P_SPINS(d),S_FLIGHT::P=Q
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- S(d);N_GUARD,XS(D)::QAB1(B)
- S(d);N_GUARD::QAB1(B),XS(d)
- S(d);N_GUARD::QAB1(B)
- S(d);N_GUARD,XB(L)::QAB1(B)
- Tries
- Try
- S(D);CHECK
- Vars
- K(b);P-FLIGHT,P_SPINB(c),XP(E)::QAB1(B)
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- Refutation
- P(a);XS(D)
- Try
- S(D);CHECK,XS(d)
- Vars
- K(b);S_FLIGHT::P=Q
- K(b);P_SPINR(g),S_FLIGHT::QAB(B)
- Refutation
- P(f);XS(D)
- Try
- S(F);
- Vars
- K(b);P_SPINS(d),S_FLIGHT::P=Q
- K(b);P_SPINB(c),P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- B(c);XP(E)::QAB1(B)
- B(c);XR(G)::QAB1(B)
- B(c);XB(J)::QAB1(B)
- B(c);::QAB1(B)
- P(f);SBLOCK::QAR1(B),XB(c)
- Refutation
- P(e);
- Try
- S(F);CHECK
- Vars
- K(b);P_SPINB(c),P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- Refutation
- P(a);XS(F)
- Try
- S(F);
- Vars
- K(b);P_SPINS(d),S_FLIGHT::P=Q
- K(b);P_SPINB(c),P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- B(c);XP(E)::QAB1(B)
- B(c);XR(G)::QAB1(B)
- B(c);XB(J)::QAB1(B)
- B(c);::QAB1(B)
- P(f);SBLOCK::QAR1(B),XB(c)
- Refutation
- P(e);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- K(b);P_SPINS(d),S_FLIGHT::P=Q
- Refutation
- P(e);XS(F)
- Try
- Q(B);
- Threat
- QAB(B)+S(F)
- Vars
- K(b);P_SPINS(d),S_FLIGHT::QAB(B)+S(F)
- Refutation
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT
- Try
- Q(B);CHECK
- Refutation
- S(d);XQ(B)
- Try
- P(K);CHECK
- Vars
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- S(d);XQ(K)::QAB1(B)
- Refutation
- P(f);P_SPINP(f)
- Try
- P(K);CHECK
- Vars
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(B)
- S(d);XB(K)::QAB1(B)
- Refutation
- P(f);P_SPINP(f)
- Try
- Actual
- Q(B);
- Threat
- QAB(B)+S(F)
- Vars
- K(b);P-FLIGHT,P_SPINB(c),XP(E)::R(G)+S(F)
- K(b);P_SPINS(d),S_FLIGHT::QAB(B)+S(F)
- K(b);P_SPINR(g),P_SPINS(d),S_FLIGHT::QAB(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).