MESON Chess Problem Database
Problem Display
PID: 225732 (8/4p3/2p1P3/2p1PKp1/2Qp1NB1/1Np1k1B1/2P2n1r/6n1 w - - 0 1)
Riczu, Lajos
Praca, 1958
#2
9 + 10
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Sg2#
- 1...Rg2
- 2.Sxg2#
- 1...Rh3
- 2.Sg2#
- 1...Rh4
- 2.Sg2#
- 1...Rh5
- 2.Sg2#
- 1...Rh6
- 2.Sg2#
- 1...Rh7
- 2.Sg2#
- 1...Rh8
- 2.Sg2#
- 1...Se2
- 2.Qxe2#
- 1...Sf3
- 2.Qe2#
- 1...Sgh3
- 2.Qe2#
- 1...Sd1
- 2.Qd3#
- 1...Sh1
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sfh3
- 2.Qd3#
- 1...Se4
- 2.Qd3#
- 1...Sxg4
- 2.Qd3#
- 1...d3
- 2.Qxc5#
- 1...gxf4
- 2.Bxf4#
- 1...Rh1
- Tries
- 1.Bxf2+?
- 1...Rxf2
- 2.Qd3#
- 1...Kxf2!
- 1...Rxf2
- 1.Bd1?
- 1...Sxd1
- 2.Qd3#
- 1...gxf4
- 2.Bxf4#
- 1...Se2
- 2.Qxe2#
- 1...Rh1
- 2.Sg2#
- 1...Rg2
- 2.Sxg2#
- 1...Rh3
- 2.Sg2#
- 1...Rh4
- 2.Sg2#
- 1...Rh5
- 2.Sg2#
- 1...Rh6
- 2.Sg2#
- 1...Rh7
- 2.Sg2#
- 1...Rh8
- 2.Sg2#
- 1...Sf3
- 2.Qe2#
- 1...Sgh3
- 2.Qe2#
- 1...Sh1
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sfh3
- 2.Qd3#
- 1...Se4
- 2.Qd3#
- 1...Sg4
- 2.Qd3#
- 1...d3
- 2.Qxc5#
- 1...g4!
- 1...Sxd1
- 1.Qf1?
- threat
- 2.Qc1#
- 1...Sxg4
- 2.Qd3#
- 1...Se2
- 2.Qxe2#
- 1...Sf3
- 2.Qe2#
- 1...Sd1
- 2.Qd3#
- 1...Sh1
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sfh3
- 2.Qd3#
- 1...Se4
- 2.Qd3#
- 1...d3!
- threat
- 1.Qb5?
- 1...Sxg4
- 2.Qd3#
- 1...gxf4
- 2.Bxf4#
- 1...cxb5
- 2.Sd5#
- 1...Rh1
- 2.Sg2#
- 1...Rg2
- 2.Sxg2#
- 1...Rh3
- 2.Sg2#
- 1...Rh4
- 2.Sg2#
- 1...Rh5
- 2.Sg2#
- 1...Rh6
- 2.Sg2#
- 1...Rh7
- 2.Sg2#
- 1...Rh8
- 2.Sg2#
- 1...Se2
- 2.Qxe2#
- 1...Sf3
- 2.Qe2#
- 1...Sgh3
- 2.Qe2#
- 1...Sd1
- 2.Qd3#
- 1...Sh1
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sfh3
- 2.Qd3#
- 1...Se4
- 2.Qd3#
- 1...d3
- 2.Qxc5#
- 1...c4!
- 1...Sxg4
- 1.Qxc3+?
- 1...Sd3
- 2.Qxd3#
- 1...d3
- 2.Qd2#
- 2.Qxc5#
- 1...dxc3!
- 1...Sd3
- 1.Bxf2+?
- Keys
- 1.Qd5!
- 1...Sxg4
- 2.Qe4#
- 1...gxf4
- 2.Bxf4#
- 1...cxd5
- 2.Sxd5#
- 1...Rh1
- 2.Sg2#
- 1...Rg2
- 2.Sxg2#
- 1...Rh3
- 2.Sg2#
- 1...Rh4
- 2.Sg2#
- 1...Rh5
- 2.Sg2#
- 1...Rh6
- 2.Sg2#
- 1...Rh7
- 2.Sg2#
- 1...Rh8
- 2.Sg2#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sgh3
- 2.Qf3#
- 1...Sd1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sfh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...d3
- 2.Qxc5#
- 1...c4
- 2.Qxd4#
- 1...Sxg4
- 1.Qd5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::S(E)
- R(c);N_GUARD::S(E),XR(c)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(a);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- S(b);N_GUARD,XB(F)::QAR1(D)
- P(f);OGATEB::QAB(D),XP(g)
- P(h);OGATE,XS(E)::B(C),XP(h)
- Tries
- Try
- B(C);CHECK,XS(b)
- Vars
- R(c);P_PINS(E),SBLOCK,XB(C)::QAR1(D)
- Refutation
- K(e);S_FLIGHT,XB(C)
- Try
- B(F);
- Vars
- S(b);N_GUARD,XB(F)::QAR1(D)
- P(h);OGATE,XS(E)::B(C),XP(h)
- S(a);N_GUARD::QAR1(D),XS(a)
- R(c);N_GUARD::S(E)
- R(c);N_GUARD::S(E),XR(c)
- S(a);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(f);OGATEB::QAB(D),XP(g)
- Refutation
- P(h);
- Try
- Q(D);
- Threat
- QAB(D)
- Vars
- S(b);N_GUARD,XB(F)::QAR1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(a);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- Refutation
- P(f);
- Try
- Q(D);
- Vars
- S(b);N_GUARD,XB(F)::QAR1(D)
- P(h);OGATE,XS(E)::B(C),XP(h)
- P(i);N_GUARD,XQ(D)::S(E)
- R(c);N_GUARD::S(E)
- R(c);N_GUARD::S(E),XR(c)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(a);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(f);OGATEB::QAB(D),XP(g)
- Refutation
- P(g);
- Try
- Q(D);CHECK,XP(d)
- Vars
- S(b);N_GUARD,P_SPINS(b)::QAR1(D),XS(b)
- Refutation
- P(f);XQ(D)
- Try
- Actual
- Q(D);
- Vars
- S(b);N_GUARD,XB(F)::QAR1(D)
- P(h);OGATE,XS(E)::B(C),XP(h)
- P(i);XQ(D)::S(E),XP(i)
- R(c);N_GUARD::S(E)
- R(c);N_GUARD::S(E),XR(c)
- S(a);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(f);OGATEB::QAB(D),XP(g)
- P(g);N_GUARD::QAB1(D),XP(f)
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).