MESON Chess Problem Database
Problem Display
PID: 173718 (2n5/2P2pN1/5p1R/p1Qpk3/R2p2p1/3Bn1P1/1N2K3/8 w - - 0 1)
Boros, Sandor
Magyar Sakkvilag, 1924
#2
9 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...Sd1
- Tries
- 1.Kd2?
- 1...Sc4+
- 2.Sxc4#
- 1...Sd1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...Sf1+!
- 1...Sc4+
- 1.Kf2?
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...Sd1+!
- 1...Sf1
- 1.Bb1?
- 1...d3+
- 2.Sxd3#
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...Sc2!
- 1...d3+
- 1.Bc2?
- 1...d3+
- 2.Sxd3#
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...Sxc2!
- 1...d3+
- 1.Bf5?
- threat
- 2.Sd3#
- 1...d3+
- 2.Sxd3#
- 1...Sxf5!
- threat
- 1.Bh7?
- threat
- 2.Sd3#
- 1...d3+
- 2.Sxd3#
- 1...f5
- 2.Qxd4#
- 1...Sf5!
- threat
- 1.Rh1?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5!
- 1...Sd1
- 1.Rh2?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5!
- 1...Sd1
- 1.Rh4?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5!
- 1...Sd1
- 1.Rh5+?
- 1...Sf5
- 2.Sc4#
- 2.Rxf5#
- 1...f5!
- 1...Sf5
- 1.Rxf6?
- threat
- 2.Qxd4#
- 1...Sc2
- 2.Rf5#
- 1...Sc4
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Kxf6!
- threat
- 1.Rg6?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...fxg6!
- 1...Sd1
- 1.Rh7?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5!
- 1...Sd1
- 1.Rh8?
- 1...Sd1
- 2.Sc4#
- 1...Sf1
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sg2
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf5
- 2.Sc4#
- 1...Sb6
- 2.Re8#
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Re8#
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5!
- 1...Sd1
- 1.Qb6?
- threat
- 2.Qxf6#
- 1...Sd6
- 2.Qxd4#
- 1...f5
- 2.Qxd4#
- 2.Qf6#
- 1...Sxb6!
- threat
- 1.Qxd5+?
- 1...Sxd5
- 2.Sc4#
- 1...Kxd5!
- 1...Sxd5
- 1.Qc6?
- threat
- 2.Qxf6#
- 1...f5
- 2.Qf6#
- 1...Sd6!
- threat
- 1.Kd2?
- Keys
- 1.Be4!
- 1...d3+
- 2.Sxd3#
- 1...Kxe4
- 2.Qxd4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sf5
- 2.Qxd5#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qxd4#
- 1...Sa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...f5
- 2.Qxd4#
- 1...d3+
- 1.Be4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(a);N_GUARD::S(A)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Refutation
- S(a);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Refutation
- S(a);CHECK
- Try
- B(C);
- Vars
- P(b);CHECK::S(A),XP(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Refutation
- S(a);
- Try
- B(C);
- Vars
- P(b);CHECK::S(A),XP(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Refutation
- S(a);XB(C)
- Try
- B(C);
- Threat
- S(A)
- Vars
- P(b);CHECK::S(A),XP(b)
- Refutation
- S(a);XB(C)
- Try
- B(C);
- Threat
- S(A)
- Vars
- P(b);CHECK::S(A),XP(b)
- P(g);::QAB1(F),XP(b)
- Refutation
- S(a);
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- Refutation
- P(g);
- Try
- R(G);CHECK
- Refutation
- P(g);
- Try
- R(G);XP(g)
- Threat
- QAB1(F),XP(b)
- Vars
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT,XR(G)
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
- Refutation
- P(h);XR(G)
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- Refutation
- P(g);
- Try
- Q(F);N_PINP(e)
- Threat
- QAB1(F),XP(g)
- Vars
- S(i);SBLOCK::QAB1(F),XP(b)
- Refutation
- S(i);XQ(F)
- Try
- Q(F);CHECK,XP(e)
- Vars
- S(a);SBLOCK,XQ(F)::S(A)
- Refutation
- K(f);P-FLIGHT,XQ(F)
- Try
- Q(F);N_PINP(e)
- Threat
- QAB1(F),XP(g)
- Vars
- P(g);::QAB1(F)
- Refutation
- S(i);
- Try
- Actual
- B(C);
- Vars
- P(b);CHECK::S(A),XP(b)
- K(f);N_SPINP(e),P-FLIGHT,P_SPINP(b),XB(C)::QAR1(F),XP(b)
- S(a);N_GUARD::QAR1(F),XP(e)
- S(i);N_GUARD::QAR2(F)
- S(i);SBLOCK::QAB1(F),XP(b)
- S(i);N_GUARD::QAR2(F),XS(i)
- P(g);::QAB1(F),XP(b)
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).