MESON Chess Problem Database
Problem Display
PID: 231259 (5N2/p3B3/p7/4kp2/p1P4Q/P2P1P2/1R2n2K/4rB2 w - - 0 1)
Dvorak, Franz
13th Prize, Kagans Neueste Schachnachrichten, 1927
#2
10 + 7
| 6490 | yacpdb | 2021 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Rxf1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 1...a5
- 2.Rb5#
- 1...Ra1
- Tries
- 1.Kg2?
- 1...Rxf1
- 2.Rxe2#
- 1...f4
- 2.Qf6#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5
- 2.Rb5#
- 1...Sf4+!
- 1...Rxf1
- 1.Bg2?
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Rf1
- 2.Rxe2#
- 1...Rg1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5
- 2.Rb5#
- 1...Rh1+!
- 1...Sf4
- 1.Bh3?
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 2.Qh8#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Rf1
- 2.Rxe2#
- 1...Rg1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5
- 2.Rb5#
- 1...Rh1+!
- 1...Sf4
- 1.Bc5?
- 1...Rxf1
- 2.Rxe2#
- 1...f4
- 2.Qg5#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Sc1
- 2.Qd4#
- 2.d4#
- 2.f4#
- 1...Sg1
- 2.Qd4#
- 2.d4#
- 2.f4#
- 1...Sc3
- 2.Qd4#
- 2.d4#
- 2.f4#
- 1...Sg3
- 2.Qd4#
- 2.d4#
- 2.f4#
- 1...Sd4
- 2.Qxd4#
- 2.f4#
- 1...Sf4
- 2.Qh8#
- 2.d4#
- 1...a5!
- 1...Rxf1
- 1.Bd8?
- threat
- 2.Bc7#
- 1...Sf4
- 2.Qf6#
- 1...f4
- 2.Qf6#
- 1...Kd6!
- threat
- 1.Ra2?
- 1...Rxf1
- 2.Rxe2#
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5!
- 1...Rxf1
- 1.Rc2?
- 1...Rxf1
- 2.Rxe2#
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5!
- 1...Rxf1
- 1.Rd2?
- 1...Rxf1
- 2.Rxe2#
- 1...Sf4
- 2.Qf6#
- 2.Qh8#
- 2.d4#
- 1...f4
- 2.Qf6#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sg3
- 2.d4#
- 1...Sd4
- 2.f4#
- 1...a5!
- 1...Rxf1
- 1.Rb6?
- threat
- 2.Sg6#
- 2.Sd7#
- 2.Bd6#
- 2.Bf6#
- 2.Re6#
- 1...Sf4
- 2.Bf6#
- 2.Qf6#
- 2.Qh8#
- 1...f4
- 2.Qf6#
- 1...Sd4
- 2.Sg6#
- 2.Sd7#
- 2.Bd6#
- 2.Bf6#
- 2.f4#
- 1...axb6!
- threat
- 1.Qh6?
- threat
- 2.Qe3#
- 2.Qd6#
- 1...f4
- 2.Qf6#
- 1...Sc1
- 2.Qd6#
- 1...Sg1
- 2.Qd6#
- 1...Sc3
- 2.Qd6#
- 1...Sg3
- 2.Qd6#
- 1...Sd4
- 2.Sd7#
- 2.Bd6#
- 2.Qd6#
- 2.f4#
- 1...Sf4
- 2.Qg7#
- 2.Qd6#
- 2.Qf6#
- 2.Qh8#
- 1...Kd4!
- threat
- 1.f4+?
- 1...Sxf4
- 2.Qf6#
- 2.Qh8#
- 1...Kd4!
- 1...Sxf4
- 1.Kg2?
- Keys
- 1.Qf2!
- threat
- 2.Qe3#
- 1...Kf4
- 2.Sg6#
- 1...Sc1
- 2.f4#
- 1...Sg1
- 2.f4#
- 1...Sc3
- 2.f4#
- 1...Sg3
- 2.f4#
- 1...Sd4
- 2.f4#
- 1...Sf4
- 2.d4#
- 1...f4
- 2.Qc5#
- threat
- 1.Qf2!
This anticipates 207831(1954)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- R(a);N_GUARD::R(B),XS(b)
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- P(e);::QAB1(H)
- P(f);N_GUARD::R(B)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- P(e);::QAB1(H)
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- P(f);N_GUARD::R(B)
- Refutation
- S(b);CHECK
- Try
- B(A);
- Vars
- P(e);::QAB1(H)
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- P(f);N_GUARD::R(B)
- Refutation
- R(a);CHECK
- Try
- B(A);
- Vars
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- P(f);N_GUARD::R(B)
- Refutation
- R(a);CHECK
- Try
- B(I);
- Vars
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- P(e);OGATEB::QAR2(H)
- R(a);N_GUARD::R(B),XS(b)
- Refutation
- P(f);
- Try
- B(I);
- Threat
- B(I)
- Vars
- S(b);SBLOCK::QAB1(H)
- P(e);::QAB1(H)
- Refutation
- K(d);S_FLIGHT
- Try
- R(B);
- Vars
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- P(e);::QAB1(H)
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- Refutation
- P(f);
- Try
- R(B);
- Vars
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- P(e);::QAB1(H)
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- Refutation
- P(f);
- Try
- R(B);
- Vars
- R(a);N_GUARD,XB(A)::R(B),XS(b)
- P(e);::QAB1(H)
- R(a);N_GUARD::R(B),XS(b)
- S(b);N_GUARD::P(E)
- S(b);N_GUARD,SBLOCK::P(F)
- Refutation
- P(f);
- Try
- R(B);
- Threat
- DUALS(5)
- Vars
- P(e);::QAB1(H)
- Refutation
- P(g);XR(B)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- P(e);::QAB1(H)
- S(b);::QAB1(H)
- Refutation
- K(d);S_FLIGHT
- Try
- P(F);CHECK
- Refutation
- K(d);S_FLIGHT
- Try
- Actual
- Q(H);
- Threat
- QAR2(H)
- Vars
- K(d);S_FLIGHT::S(J)
- S(b);N_GUARD::P(F)
- S(b);N_GUARD,SBLOCK::P(E)
- P(e);SBLOCK::QAR2(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).