MESON Chess Problem Database
Problem Display
PID: 198834 (1n2N3/4p1n1/Q7/2BPk1Kp/5pRP/2pb4/3P2B1/8 w - - 0 1)
Mendes da Costa, Henri
Algemeen Handelsblad, 1921
#2
9 + 8
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.Qxe2#
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Bf5
- 2.d4#
- 1...Bxa6
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sf5
- 2.Qe6#
- 1...Se6+
- 2.Qxe6#
- 1...Sxe8
- 2.Qe6#
- 1...cxd2
- 2.Qa1#
- 1...c2
- 2.Qa1#
- 1...e6
- 2.Qd6#
- 1...Bb1
- Tries
- 1.Qxd3?
- threat
- 2.Bd4#
- 2.Qe2#
- 2.Qe4#
- 2.Qxc3#
- 2.Qd4#
- 1...Sxe8
- 2.Qe2#
- 2.Qe4#
- 2.Qf5#
- 2.Qxc3#
- 2.Qd4#
- 1...cxd2
- 2.Bd4#
- 2.Qe2#
- 2.Qe4#
- 2.Qc3#
- 2.Qd4#
- 1...Sc6
- 2.Qe2#
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 2.Qxf5#
- 1...c2
- 2.Bd4#
- 2.Qe2#
- 2.Qe4#
- 2.Qc3#
- 2.Qd4#
- 1...f3
- 2.Re4#
- 2.Qe4#
- 2.Qd4#
- 1...Se6+!
- threat
- 1.Qc4?
- threat
- 2.Bd4#
- 2.Qxc3#
- 2.Qd4#
- 2.Qxf4#
- 1...Bxc4
- 2.d4#
- 1...Sxe8
- 2.Qxc3#
- 2.Qd4#
- 2.Qxf4#
- 1...cxd2
- 2.Bd4#
- 2.Qc3#
- 2.Qd4#
- 2.Qxf4#
- 1...Sc6
- 2.Qxf4#
- 1...Be4
- 2.Bd4#
- 2.Qd4#
- 2.Qxe4#
- 2.d4#
- 1...Sf5
- 2.Qxf4#
- 1...c2
- 2.Bd4#
- 2.Qc3#
- 2.Qd4#
- 2.Qxf4#
- 1...f3
- 2.Bd4#
- 2.Qd4#
- 1...Se6+!
- threat
- 1.Qa4?
- threat
- 2.Bd4#
- 2.Qd4#
- 2.Qxf4#
- 1...Sxe8
- 2.Qd4#
- 2.Qxf4#
- 1...Be4
- 2.Qd4#
- 2.Qxe4#
- 1...f3
- 2.Qd4#
- 1...Sc6
- 2.Qxf4#
- 1...Bc4
- 2.d4#
- 1...Sf5
- 2.Qxf4#
- 1...Se6+!
- threat
- 1.Qxd3?
- Keys
- 1.Sf6!
- 1...Se6+
- 2.Qxe6#
- 1...exf6+
- 2.Qxf6#
- 1...Bxa6
- 2.d4#
- 1...Sxa6
- 2.Sd7#
- 1...cxd2
- 2.Qa1#
- 1...hxg4
- 2.Sxg4#
- 1...Bb1
- 2.d4#
- 1...Bf1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.Qxe2#
- 2.d4#
- 1...Bc4
- 2.d4#
- 1...Be4
- 2.d4#
- 1...Bb5
- 2.d4#
- 1...Bf5
- 2.d4#
- 1...Bg6
- 2.d4#
- 1...Bh7
- 2.d4#
- 1...Sf5
- 2.Qe6#
- 1...Se8
- 2.Qe6#
- 1...Sc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...c2
- 2.Qa1#
- 1...f3
- 2.Bd4#
- 1...e6
- 2.Qd6#
- 1...Se6+
- 1.Sf6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- B(b);OGATE::P(A)
- B(b);OGATE,XQ(H)::P(A)
- S(g);N_GUARD::QAR1(H)
- S(g);CHECK,N_GUARD::QAR1(H),XS(g)
- S(g);N_GUARD,XS(I)::QAR1(H)
- P(a);OGATEB,XP(A)::QAB(H)
- P(a);OGATEB::QAB(H)
- P(f);N_GUARD::QAB1(H)
- Tries
- Try
- Q(H);XB(b)
- Threat
- DUALS(5)
- Refutation
- S(g);CHECK
- Try
- Q(H);
- Threat
- DUALS(4)
- Vars
- B(b);OGATE,XQ(H)::P(A)
- S(h);::QAB1(H),XP(c)
- S(g);::QAB1(H),XP(c)
- Refutation
- S(g);CHECK
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- P(c);::QAB1(H)
- S(h);::QAB1(H),XP(c)
- B(b);OGATE::P(A)
- S(g);::QAB1(H),XP(c)
- Refutation
- S(g);CHECK
- Try
- Actual
- S(I);
- Vars
- S(g);CHECK,N_GUARD::QAR1(H),XS(g)
- P(f);CHECK,OGATE,XS(I)::QAB1(H),XP(f)
- B(b);OGATE,XQ(H)::P(A)
- S(h);N_GUARD,XQ(H)::S(I)
- P(a);OGATEB,XP(A)::QAB(H)
- P(e);XR(C)::S(I),XP(e)
- B(b);OGATE::P(A)
- S(g);N_GUARD::QAR1(H)
- S(h);N_GUARD::S(I)
- S(h);N_GUARD::S(I),XS(h)
- P(a);OGATEB::QAB(H)
- P(c);::B(E)
- P(f);N_GUARD::QAB1(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).