MESON Chess Problem Database
Problem Display
PID: 261267 (3Q4/b4r1b/7K/n2Nk1P1/2Pp3R/r6B/3N2p1/5nq1 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Neue Zurcher Zeitung, 1981
#2
8 + 10
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rf2
- 2.Qc7#
- 2.Qe7#
- 1...Rf3
- 2.Qc7#
- 2.Qe7#
- 1...Rf4
- 2.Qc7#
- 2.Qe7#
- 1...Rf5
- 2.Re4#
- 2.Qe7#
- 1...Rf6+
- 2.Qxf6#
- 1...Rb7
- 2.Qf6#
- 1...Rc7
- 2.Qf6#
- 2.Qxc7#
- 1...Rd7
- 2.Qf6#
- 1...Re7
- 2.Qxe7#
- 1...Rg7
- 2.Qf6#
- 1...Rf8
- 2.Qc7#
- 2.Qe7#
- 1...Be4
- 2.Rxe4#
- 1...Bg8
- 2.Re4#
- 1...Sxc4
- 2.Sxc4#
- 1...Rf2
- Tries
- 1.Sf3+?
- 1...Rfxf3
- 2.Qc7#
- 2.Qe7#
- 1...Raxf3!
- 1...Rfxf3
- 1.Sc3?
- threat
- 2.Qd5#
- 1...Rf6+
- 2.Qxf6#
- 1...Rd7
- 2.Qf6#
- 1...Be4
- 2.Rxe4#
- 1...Se3!
- threat
- 1.Se3?
- threat
- 2.Qd5#
- 1...Rf6+
- 2.Qxf6#
- 1...Rd7
- 2.Qf6#
- 1...Be4
- 2.Rxe4#
- 1...Sxe3!
- threat
- 1.Sb4?
- threat
- 2.Qd5#
- 1...Rf6+
- 2.Qxf6#
- 1...Rd7
- 2.Qf6#
- 1...Be4
- 2.Rxe4#
- 1...Se3!
- threat
- 1.Sf6?
- threat
- 2.Qd5#
- 1...Rxf6+
- 2.Qxf6#
- 1...Se3
- 2.Sf3#
- 1...Be4
- 2.Rxe4#
- 1...Rd7!
- threat
- 1.Sc7?
- threat
- 2.Qd5#
- 1...Rf6+
- 2.Qxf6#
- 1...Rd7
- 2.Qf6#
- 1...Be4
- 2.Rxe4#
- 1...Se3!
- threat
- 1.Se7?
- threat
- 2.Qc7#
- 2.Qd5#
- 1...Rxh3
- 2.Qd5#
- 1...Rxe7
- 2.Qxe7#
- 2.Qd5#
- 1...Sxc4
- 2.Sxc4#
- 2.Sc6#
- 2.Qd5#
- 1...Rf5
- 2.Re4#
- 2.Qd5#
- 1...Bf5
- 2.Qd5#
- 1...Se3
- 2.Qc7#
- 1...Bc5
- 2.Qd5#
- 1...Bb6
- 2.Qd5#
- 1...Bb8
- 2.Qd5#
- 2.Qxb8#
- 1...Be4
- 2.Rxe4#
- 2.Qc7#
- 1...Sb7
- 2.Sc6#
- 2.Qd5#
- 1...Rf6+!
- threat
- 1.Qb8+?
- 1...Rc7
- 2.Qxc7#
- 1...Bxb8!
- 1...Rc7
- 1.Qe8+?
- 1...Re7
- 2.Qxe7#
- 1...Kd6!
- 1...Re7
- 1.Sf3+?
- Keys
- 1.Sb6!
- threat
- 2.Qd5#
- 1...Rf6+
- 2.Qxf6#
- 1...Rd7
- 2.Qf6#
- 1...Se3
- 2.Qxd4#
- 1...Be4
- 2.Rxe4#
- threat
- 1.Sb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- R(i);N_GUARD::QAR2(H),XR(i)
- B(j);N_GUARD::R1(D),XB(j)
- B(j);N_GUARD::R1(D)
- S(f);XP(C)::S(A),XS(f)
- Tries
- Try
- S(A);CHECK
- Refutation
- R(d);XS(A)
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- B(j);N_GUARD::R1(D),XB(j)
- Refutation
- S(a);
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- B(j);N_GUARD::R1(D),XB(j)
- Refutation
- S(a);XS(E)
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- B(j);N_GUARD::R1(D),XB(j)
- Refutation
- S(a);
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,OGATE,XS(E)::QAB1(H),XR(i)
- S(a);S_CUTR(d)::S(A)
- B(j);N_GUARD::R1(D),XB(j)
- Refutation
- R(i);
- Try
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- B(j);N_GUARD::R1(D),XB(j)
- Refutation
- S(a);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- R(d);P_PINR(D),XB(B)::QAR1(H)
- B(j);::QAR1(H)
- S(a);::QAB(H)
- B(h);::QAR1(H)
- Refutation
- R(i);CHECK
- Try
- Q(H);CHECK
- Vars
- R(i);N_GUARD,P_SPINR(i)::QAB(H),XR(i)
- Refutation
- B(h);XQ(H)
- Try
- Q(H);CHECK
- Vars
- R(i);N_GUARD,P_SPINR(i)::QAR2(H),XR(i)
- Refutation
- K(g);S_FLIGHT
- Try
- Actual
- S(E);
- Threat
- QAR1(H)
- Vars
- R(i);CHECK,N_GUARD::QAB1(H),XR(i)
- R(i);N_GUARD::QAB1(H)
- S(a);S_CUTQ(b)::QAB1(H),XP(e)
- B(j);N_GUARD::R1(D),XB(j)
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).