MESON Chess Problem Database
Problem Display
PID: 202444 (4BNb1/1p3p2/3p4/1KPkqR1n/n3p3/3p2Q1/4N1p1/6B1 w - - 0 1)
Onitiu, Valerian
Roth, Alfred
2nd Prize, Sydsvenska Dagbladet Snallposten, 1923
#2
8 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxf5
- 2.Qxd6#
- 1...Bh7
- 2.Bxf7#
- 1...Sb2
- 2.Sc3#
- 1...Sc3+
- 2.Sxc3#
- 1...Sxc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...Sxg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...dxe2
- 2.Qb3#
- 1...d2
- 2.Qb3#
- 1...e3
- 2.Qxg2#
- 2.Qf3#
- 1...dxc5
- 2.Qxe5#
- 1...b6
- 2.Bc6#
- 1...f6
- 2.Qxg8#
- 1...Qxf5
- Tries
- 1.Bd7?
- 1...Sc3+
- 2.Sxc3#
- 1...Qxf5
- 2.Qxd6#
- 1...Sxc5
- 2.Sc3#
- 1...Sxg3
- 2.Sf4#
- 1...dxe2
- 2.Qb3#
- 1...dxc5
- 2.Qxe5#
- 1...e3
- 2.Qxg2#
- 2.Qf3#
- 1...Sb2
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d2
- 2.Qb3#
- 1...b6
- 2.Bc6#
- 1...f6
- 2.Qxg8#
- 1...Bh7!
- 1...Sc3+
- 1.Rxh5?
- threat
- 2.Sf4#
- 1...Sc3+
- 2.Sxc3#
- 1...Qxh5
- 2.Qxd6#
- 1...dxe2
- 2.Qb3#
- 1...dxc5
- 2.Qxe5#
- 1...e3
- 2.Qxg2#
- 2.Qf3#
- 1...Qf5
- 2.Rxf5#
- 2.Qxd6#
- 1...Qg5
- 2.Qxd6#
- 1...f5!
- threat
- 1.Qf2?
- threat
- 2.Qd4#
- 1...Sc3+
- 2.Sxc3#
- 1...e3
- 2.Qxg2#
- 2.Qf3#
- 1...dxc5!
- threat
- 1.Qe3?
- threat
- 2.Qd4#
- 1...Sc3+
- 2.Sxc3#
- 1...dxc5!
- threat
- 1.Bd7?
- Keys
- 1.Qg5!
- 1...Sc3+
- 2.Sxc3#
- 1...Qxf5
- 2.Qxf5#
- 1...Sxc5
- 2.Sc3#
- 1...dxe2
- 2.Qd2#
- 1...dxc5
- 2.Qd8#
- 1...e3
- 2.Qxg2#
- 1...Bh7
- 2.Bxf7#
- 1...Sb2
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d2
- 2.Qxd2#
- 1...b6
- 2.Bc6#
- 1...f6
- 2.Qxg8#
- 1...Sc3+
- 1.Qg5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(f);N_SPINQ(f),OGATE,XR(F)::QAR1(C),XP(h)
- B(k);N_GUARD::B(G),XP(j)
- S(c);N_GUARD::S(B)
- S(c);CHECK,N_GUARD::S(B),XS(c)
- S(c);N_GUARD,XP(E)::S(B)
- S(g);N_GUARD,XQ(C)::S(B)
- S(g);N_GUARD::S(B),XS(g)
- S(g);N_GUARD::S(B)
- P(b);OGATE,XS(B)::QAB(C)
- P(b);OGATE::QAB(C)
- P(h);N_GUARD,XP(E)::QAR1(C),XQ(f)
- P(i);N_GUARD::B(G)
- P(j);OGATEB::QAB(C),XB(k)
- Tries
- Try
- B(G);
- Vars
- S(c);CHECK,N_GUARD::S(B),XS(c)
- Q(f);N_SPINQ(f),OGATE,XR(F)::QAR1(C),XP(h)
- S(c);N_GUARD,XP(E)::S(B)
- S(g);N_GUARD,XQ(C)::S(B)
- P(b);OGATE,XS(B)::QAB(C)
- P(h);N_GUARD,XP(E)::QAR1(C),XQ(f)
- S(c);N_GUARD::S(B)
- S(g);N_GUARD::S(B),XS(g)
- S(g);N_GUARD::S(B)
- P(b);OGATE::QAB(C)
- P(i);N_GUARD::B(G)
- P(j);OGATEB::QAB(C),XB(k)
- Refutation
- B(k);
- Try
- R(F);XS(g)
- Threat
- S(B)
- Vars
- S(c);CHECK,N_GUARD::S(B),XS(c)
- Q(f);N_SPINQ(f),OGATE,XR(F)::QAR1(C),XP(h)
- P(b);OGATE,XS(B)::QAB(C)
- P(h);N_GUARD,XP(E)::QAR1(C),XQ(f)
- Q(f);OGATE::QAR1(C),XP(h)
- Refutation
- P(j);N_SPINQ(f)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- S(c);CHECK,N_GUARD::S(B),XS(c)
- Refutation
- P(h);XP(E)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- S(c);CHECK,N_GUARD::S(B),XS(c)
- Refutation
- P(h);XP(E)
- Try
- Actual
- Q(C);
- Vars
- S(c);CHECK,N_GUARD::S(B),XS(c)
- Q(f);OGATE,XR(F)::QAR2(C),XQ(f)
- S(c);N_GUARD,XP(E)::S(B)
- P(b);OGATEB,XS(B)::QAR(C)
- P(h);OGATEB,XP(E)::QAR(C)
- P(d);OGATEB::QAB(C),XP(a)
- B(k);N_GUARD::B(G),XP(j)
- S(c);N_GUARD::S(B)
- S(g);N_GUARD::S(B)
- S(g);N_GUARD::S(B),XS(g)
- P(b);OGATEB::QAR(C),XP(b)
- P(i);N_GUARD::B(G)
- P(j);OGATEB::QAB(C),XB(k)
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).