MESON Chess Problem Database
Problem Display
PID: 269656 (5R1K/3N4/7p/q1Qb2p1/2PnkB2/1r1p4/2np4/3N1R2 w - - 0 1)
Pereira, Alvaro
Quaresma, Luis
Best Problems, 2023
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Qxd5#
- 1...Qb4
- 2.Qxd5#
- 1...Qb6
- 2.Qxd5#
- 1...Qc7
- 2.Qxd5#
- 1...Qd8
- 2.Qxd5#
- 1...Qa1
- 2.Qxd5#
- 1...Qa2
- 2.Qxd5#
- 1...Qa3
- 2.Qxd5#
- 1...Qa4
- 2.Qxd5#
- 1...Qxc5
- 2.Sxc5#
- 1...Qa6
- 2.Qxd5#
- 1...Qa7
- 2.Qxd5#
- 1...Rb4
- 2.Sc3#
- 1...Bxc4
- 2.Sf6#
- 1...Bc6
- 2.Sf6#
- 1...Be6
- 2.Sf6#
- 1...Bb7
- 2.Sf6#
- 1...Bf7
- 2.Sf6#
- 1...Ba8
- 2.Sf6#
- 1...Bg8
- 2.Sf6#
- 1...Sf3
- 2.Sf2#
- 1...Sb5
- 2.Qxd5#
- 1...Sf5
- 2.Sf6#
- 1...gxf4
- 2.R1xf4#
- 2.R8xf4#
- 1...Qc3
- Tries
- 1.Sc3+?
- 1...Qxc3
- 2.Qxd5#
- 1...Rxc3!
- 1...Qxc3
- 1.Bxd2?
- threat
- 2.Sf2#
- 1...Qxd2
- 2.Qxd5#
- 1...Bf7
- 2.Sf6#
- 1...Sf5!
- threat
- 1.Bh2?
- threat
- 2.Sf6#
- 1...Qb6
- 2.Qxd5#
- 1...Qd8
- 2.Qxd5#
- 1...Qa6
- 2.Qxd5#
- 1...Sf3
- 2.Sf2#
- 1...Rb6!
- threat
- 1.Bg3?
- threat
- 2.Sf6#
- 1...Qb6
- 2.Qxd5#
- 1...Qd8
- 2.Qxd5#
- 1...Qa6
- 2.Qxd5#
- 1...Sf3
- 2.Sf2#
- 1...Rb6!
- threat
- 1.Bxg5?
- threat
- 2.Sf2#
- 2.R1f4#
- 2.R8f4#
- 1...Qc7
- 2.Sf2#
- 2.Qxd5#
- 1...Qd8
- 2.Sf2#
- 2.Rf4#
- 2.Qxd5#
- 1...Qa8
- 2.Sf2#
- 2.Rf4#
- 1...Rb8
- 2.Sf2#
- 2.Rf4#
- 1...Bf7
- 2.Sf6#
- 2.Rf4#
- 1...Se2
- 2.Sf2#
- 1...Sf3
- 2.Sf2#
- 2.Rf4#
- 1...Sf5
- 2.Rf4#
- 1...Se6
- 2.Sf2#
- 1...hxg5!
- threat
- 1.Bc7?
- threat
- 2.Sf6#
- 1...Qxc7
- 2.Qxd5#
- 1...Qb6
- 2.Qxd5#
- 1...Qa6
- 2.Qxd5#
- 1...Sf3
- 2.Sf2#
- 1...Rb6!
- threat
- 1.Qxa5?
- threat
- 2.Sc5#
- 2.Qxd5#
- 1...Bxc4
- 2.Sf6#
- 2.Qe5#
- 1...gxf4
- 2.R1xf4#
- 2.R8xf4#
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sf3
- 2.Qxd5#
- 1...Sf5
- 2.Qxd5#
- 1...Sc6
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- 1...Rb5
- 2.Sc3#
- 1...Bc6
- 2.Sc5#
- 2.Sf6#
- 2.Qe5#
- 1...Be6
- 2.Sc5#
- 2.Sf6#
- 2.Qe5#
- 1...Bb7
- 2.Sc5#
- 2.Sf6#
- 2.Qe5#
- 1...Bf7
- 2.Sf6#
- 2.Qe5#
- 1...Ba8
- 2.Sc5#
- 2.Sf6#
- 2.Qe5#
- 1...Bg8
- 2.Sc5#
- 2.Sf6#
- 2.Qe5#
- 1...Se3
- 2.Sc5#
- 1...Sb4
- 2.Sc5#
- 1...Sb5!
- threat
- 1.Sc3+?
- Keys
- 1.Bd6!
- threat
- 2.Sf6#
- 1...Qd8
- 2.Qxd5#
- 1...Sf3
- 2.Sf2#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 21
- Sets
- Q(g);N_GUARD::QAB1(E),XB(h)
- Q(g);N_GUARD,P_PINR(G)::QAB1(E),XB(h)
- Q(g);XQ(E)::S(F),XQ(g)
- R(c);N_GUARD,S_CUTQ(g)::S(A)
- B(h);XP(C)::S(F)
- B(h);::S(F)
- S(e);SBLOCK::S(A)
- S(e);S_CUTQ(g)::QAB1(E),XB(h)
- S(e);SBLOCK::S(F)
- Tries
- Try
- S(A);CHECK
- Vars
- Q(g);XS(A)::QAB1(E),XB(h)
- Refutation
- R(c);XS(A)
- Try
- B(D);XP(b)
- Threat
- S(A)
- Vars
- Q(g);N_GUARD,XB(D)::QAB1(E),XB(h)
- B(h);::S(F)
- Refutation
- S(e);
- Try
- B(D);
- Threat
- S(F)
- Vars
- Q(g);N_GUARD::QAB1(E),XB(h)
- Q(g);N_GUARD,P_PINR(G)::QAB1(E),XB(h)
- S(e);::S(A)
- Refutation
- R(c);
- Try
- B(D);
- Threat
- S(F)
- Vars
- Q(g);N_GUARD::QAB1(E),XB(h)
- Q(g);N_GUARD,P_PINR(G)::QAB1(E),XB(h)
- S(e);::S(A)
- Refutation
- R(c);
- Try
- B(D);XP(i)
- Threat
- DUALS(3)
- Vars
- S(e);::S(A)
- S(e);::R1(B)
- Refutation
- P(j);XB(D)
- Try
- B(D);
- Threat
- S(F)
- Vars
- Q(g);N_GUARD,XB(D)::QAB1(E),XB(h)
- Q(g);N_GUARD::QAB1(E),XB(h)
- S(e);::S(A)
- Refutation
- R(c);
- Try
- Q(E);XQ(g)
- Threat
- DUALS(2)
- Vars
- S(e);::QAB1(E),XB(h)
- R(c);N_GUARD::S(A)
- S(a);::S(F)
- Refutation
- S(e);
- Try
- Actual
- B(D);
- Threat
- S(F)
- Vars
- Q(g);N_GUARD,P_PINR(G)::QAB1(E),XB(h)
- S(e);::S(A)
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).