MESON Chess Problem Database
Problem Display
PID: 67003 (R5N1/3pK3/2pN4/1p1k1p2/2bPp1n1/8/8/B1Q4B w - - 0 1)
Onkoud, Abdelaziz
Troll, 2001
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...b4
- 2.Qxc4#
- 1...f4
- 2.Bxe4#
- 1...Bf1
- Tries
- 1.Kxd7?
- threat
- 2.Se7#
- 1...Sf6+
- 2.Sxf6#
- 1...Se5+!
- threat
- 1.Sxe4?
- threat
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sef6#
- 1...c5
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sef6#
- 1...Bf1
- 2.Sef6#
- 2.Qc5#
- 1...Be2
- 2.Sef6#
- 2.Qc5#
- 1...Bd3
- 2.Sef6#
- 2.Qc5#
- 1...Sf2
- 2.Sxf2#
- 2.Sef6#
- 2.Sgf6#
- 1...Sh2
- 2.Sef6#
- 2.Sgf6#
- 1...Se3
- 2.Sef6#
- 2.Sgf6#
- 1...Se5
- 2.Sef6#
- 2.Sgf6#
- 1...Sf6
- 2.Sexf6#
- 2.Sgxf6#
- 1...f4
- 2.Sef6#
- 1...d6
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sxd6#
- 2.Sef6#
- 1...fxe4!
- threat
- 1.Bb2?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Bg2?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Ra2?
- 1...Bxa2
- 2.Qc5#
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...Bxa2
- 1.Ra3?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Ra4?
- 1...bxa4
- 2.Qxc4#
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...bxa4
- 1.Ra5?
- threat
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...c5!
- threat
- 1.Ra6?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Ra7?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Rb8?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Rd8?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Re8?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Rf8?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 2.Rxf5#
- 1...Sh2
- 2.Sf6#
- 2.Rxf5#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Qa3?
- threat
- 2.Qc5#
- 1...c5
- 2.Qxc5#
- 1...b4!
- threat
- 1.Qg5?
- threat
- 2.Bxe4#
- 1...Sf2
- 2.Sf6#
- 2.Qxf5#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 2.Qxf5#
- 1...Bd3!
- threat
- 1.Qc2?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qxa2#
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qxb3#
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 2.Qxe4#
- 1...c5!
- 1...b4
- 1.Qc3?
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qxb3#
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5!
- 1...b4
- 1.Kxd7?
- Keys
- 1.Rc8!
- 1...b4
- 2.Qxc4#
- 1...Bf1
- 2.Qc5#
- 1...Ba2
- 2.Qc5#
- 1...Be2
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Sf2
- 2.Sf6#
- 1...Sh2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...f4
- 2.Bxe4#
- 1...c5
- 2.Rxc5#
- 1...b4
- 1.Rc8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(d);N_GUARD::QAB1(B),XB(a)
- P(f);N_GUARD::B(C),XP(b)
- Tries
- Try
- K(F);P-FLIGHT,XP(h)
- Threat
- S(H)
- Vars
- S(c);CHECK,N_GUARD::S(H),XS(c)
- Refutation
- S(c);CHECK
- Try
- S(E);XP(b)
- Threat
- DUALS(7)
- Vars
- P(f);::B(C)+S(E),DCHECK
- Refutation
- P(f);P_SPINP(f),XS(E)
- Try
- B(A);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- B(C);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- B(a);OGATE,XR(G)::QAR1(B)
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD,XR(G)::QAB1(B),XB(a)
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Threat
- QAB1(B),XB(a)
- Vars
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- P(g);::QAR1(B),XP(g)
- Refutation
- P(d);
- Try
- Q(B);
- Threat
- B(C),XP(b)
- Vars
- S(c);N_GUARD::S(H)
- Refutation
- B(a);
- Try
- Q(B);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- Refutation
- P(g);
- Try
- Q(B);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- Refutation
- P(g);
- Try
- Actual
- R(G);
- Vars
- P(d);N_GUARD::QAB1(B),XB(a)
- B(a);OGATE::QAR1(B)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(f);N_GUARD::B(C),XP(b)
- P(g);OGATE::R1(G),XP(g)
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).