MESON Chess Problem Database
Problem Display
PID: 162097 (7r/7n/3PPkpQ/6N1/1Nb1R1P1/1p2Bn2/1K6/8 w - - 0 1)
Hartong, Jan
Zadachi i Etyudi, 1928
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Bf1
- 2.Sd5#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Bxe6
- 2.Rxe6#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Sf8
- 2.Qxh8#
- 1...Ra8
- Tries
- 1.Kc1?
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Bf1
- 2.Sd5#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8
- 2.Qxh8#
- 1...b2+!
- 1...Bxe6
- 1.Kc3?
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Bf1
- 2.Sd5#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8
- 2.Qxh8#
- 1...b2!
- 1...Bxe6
- 1.Sd3?
- threat
- 2.Rf4#
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Bxd3!
- threat
- 1.Sc6?
- threat
- 2.Rf4#
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Bd3!
- threat
- 1.Bf2?
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Bf1
- 2.Sd5#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8!
- 1...Bxe6
- 1.Bd4+?
- 1...Se5
- 2.Bxe5#
- 2.Rf4#
- 1...Sxd4!
- 1...Se5
- 1.Bf4?
- 1...Bxe6
- 2.Rxe6#
- 1...Shxg5
- 2.Qxh8#
- 1...Bf1
- 2.Sd5#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Be5#
- 1...Sg1
- 2.Be5#
- 1...Sd2
- 2.Be5#
- 1...Sh2
- 2.Be5#
- 1...Sd4
- 2.Be5#
- 1...Sh4
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 1...Sf8
- 2.Qxh8#
- 1...Sfxg5!
- 1...Bxe6
- 1.Bc5?
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Bf1
- 2.Sd5#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8!
- 1...Bxe6
- 1.Ba7?
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Bf1
- 2.Sd5#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8!
- 1...Bxe6
- 1.Qxh7?
- threat
- 2.Qe7#
- 2.Qf7#
- 2.Qxh8#
- 1...Bxe6
- 2.Rxe6#
- 2.Qe7#
- 2.Qxh8#
- 1...Sxg5
- 2.Bd4#
- 2.Qe7#
- 2.Qxh8#
- 1...Ra8
- 2.Qe7#
- 2.Qf7#
- 1...Rb8
- 2.Qe7#
- 2.Qf7#
- 1...Rc8
- 2.Qe7#
- 2.Qf7#
- 1...Rd8
- 2.Qe7#
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rf8
- 2.Qe7#
- 1...Rg8
- 2.Qe7#
- 2.Qf7#
- 1...Se5
- 2.Qe7#
- 2.Qxh8#
- 1...Rxh7!
- threat
- 1.Kc1?
- Keys
- 1.Bb6!
- 1...Bxe6
- 2.Rxe6#
- 1...Sfxg5
- 2.Bd4#
- 1...Shxg5
- 2.Qxh8#
- 1...Bf1
- 2.Sd5#
- 1...Ra8
- 2.Sxh7#
- 1...Rb8
- 2.Sxh7#
- 1...Rc8
- 2.Sxh7#
- 1...Rd8
- 2.Sxh7#
- 2.Bxd8#
- 1...Re8
- 2.Sxh7#
- 1...Rf8
- 2.Sxh7#
- 1...Rg8
- 2.Sxh7#
- 1...Be2
- 2.Sd5#
- 1...Bd3
- 2.Sd5#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Se1
- 2.Bd4#
- 1...Sg1
- 2.Bd4#
- 1...Sd2
- 2.Bd4#
- 1...Sh2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sh4
- 2.Bd4#
- 1...Se5
- 2.Rf4#
- 1...Sf8
- 2.Bd8#
- 1...Bxe6
- 1.Bb6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C)
- B(c);N_GUARD::S(C),XB(c)
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- S(f);OGATE::QAB(I),XR(g)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- S(f);OGATE::QAB(I),XR(g)
- Refutation
- P(a);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- S(f);OGATE::QAB(I),XR(g)
- Refutation
- P(a);
- Try
- S(C);
- Threat
- R(D)
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- S(b);N_GUARD::B(B),XS(b)
- S(b);N_GUARD::B(B)
- Refutation
- B(c);XS(C)
- Try
- S(C);
- Threat
- R(D)
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- S(b);N_GUARD::B(B),XS(b)
- S(b);N_GUARD::B(B)
- Refutation
- B(c);
- Try
- B(B);
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,SBLOCK,XS(F)::QAB(I),XR(g)
- B(c);N_GUARD::S(C)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- Refutation
- S(f);
- Try
- B(B);CHECK
- Refutation
- S(b);XB(B)
- Try
- B(B);
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(f);OGATE,XS(F)::QAB(I),XR(g)
- B(c);N_GUARD::S(C)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(f);OGATE::QAB(I),XR(g)
- Refutation
- S(b);XS(F)
- Try
- B(B);
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,SBLOCK,XS(F)::QAB(I),XR(g)
- B(c);N_GUARD::S(C)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- Refutation
- S(f);
- Try
- B(B);
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,SBLOCK,XS(F)::QAB(I),XR(g)
- B(c);N_GUARD::S(C)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- Refutation
- S(f);
- Try
- Q(I);N_PINP(e),XS(f)
- Threat
- DUALS(3)
- Vars
- R(g);::QAR1(I)
- R(g);::QAB1(I)
- Refutation
- R(g);XQ(I)
- Try
- Actual
- B(B);
- Vars
- B(c);OGATE,XP(H)::R1(D),XB(c)
- S(b);N_GUARD,XS(F)::B(B)
- S(f);OGATE,SBLOCK,XS(F)::QAB(I),XR(g)
- B(c);N_GUARD::S(C)
- R(g);N_GUARD::S(F),XS(f)
- B(c);N_GUARD::S(C),XB(c)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);SBLOCK::R(D)
- S(f);S_CUTR(g)::B(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).