MESON Chess Problem Database
Problem Display
PID: 179922 (4n1r1/3p1N1R/3p2n1/3N2P1/4K1k1/3pQ3/3Rq3/1b1BB3 w - - 0 1)
Gross, Erwin
2nd Prize, Oudot MT, 1975-1976
#2
9 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxd1
- 2.Rg2#
- 2.Qg1#
- 2.Qg3#
- 2.Qh3#
- 1...Qf3+
- 2.Bxf3#
- 2.Qxf3#
- 1...Sf4
- 2.Rh4#
- 1...Sh4
- 2.Rxh4#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sh8
- 2.Rh4#
- 1...Sf6+
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...Qxd1
- Tries
- 1.Kd4?
- threat
- 2.Qh3#
- 1...Kf5
- 2.Sh6#
- 1...Qf3
- 2.Qxf3#
- 1...Sf4
- 2.Qxf4#
- 1...Sh4!
- threat
- 1.Se5+?
- 1...Sxe5
- 2.Rh4#
- 1...dxe5!
- 1...Sxe5
- 1.Rxd3?
- threat
- 2.Bxe2#
- 2.Qxe2#
- 1...Qf3+
- 2.Bxf3#
- 2.Qxf3#
- 1...Sf6+
- 2.Sxf6#
- 1...Qxd1
- 2.Qg1#
- 2.Qg3#
- 2.Qh3#
- 1...Sf4
- 2.Rh4#
- 1...Sh4
- 2.Rxh4#
- 1...Se5
- 2.Rh4#
- 1...Bxd3+!
- threat
- 1.Rh1?
- threat
- 2.Sh6#
- 1...Qf3+
- 2.Bxf3#
- 2.Qxf3#
- 1...Sf6+
- 2.Sxf6#
- 1...Sh4
- 2.Rxh4#
- 1...Sf4
- 2.Rh4#
- 1...Rh8!
- threat
- 1.Rh2?
- threat
- 2.Sh6#
- 1...Qf3+
- 2.Bxf3#
- 2.Qxf3#
- 1...Sf6+
- 2.Sxf6#
- 1...Sh4
- 2.Rxh4#
- 1...Sf4
- 2.Rh4#
- 1...Rh8!
- threat
- 1.Rh3?
- threat
- 2.Sh6#
- 1...Qf3+
- 2.Qxf3#
- 1...Sf6+
- 2.Sxf6#
- 1...Sh4
- 2.Rxh4#
- 1...Sf4
- 2.Rh4#
- 1...Rh8!
- threat
- 1.Kd4?
- Keys
- 1.Ba4!
- threat
- 2.Bxd7#
- 1...Qf3+
- 2.Qxf3#
- 1...Qg2+
- 2.Rxg2#
- 1...Qxe3+
- 2.Sxe3#
- 1...Sf6+
- 2.Sxf6#
- 1...Qf1
- 2.Qg3#
- 1...Qf2
- 2.Qh3#
- 1...Sf4
- 2.Rh4#
- 1...Sh4
- 2.Rxh4#
- 1...Se5
- 2.Rh4#
- 1...Se7
- 2.Rh4#
- 1...Sf8
- 2.Rh4#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- threat
- 1.Ba4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- S(f);N_GUARD::R1(I)
- S(f);N_GUARD::R1(I),XS(f)
- S(h);CHECK,N_GUARD::S(F),XS(h)
- S(h);N_GUARD::S(F)
- Tries
- Try
- K(E);N_SPINQ(D),P-FLIGHT
- Threat
- QAB1(D)
- Vars
- K(d);N_SPINQ(b),S_FLIGHT::S(H)
- Q(b);N_GUARD::QAB1(D),XQ(b)
- S(f);N_GUARD::QAR1(D),XS(f)
- Refutation
- S(f);
- Try
- S(H);CHECK
- Vars
- S(f);XS(H)::R1(I)
- Refutation
- P(e);XS(H)
- Try
- R(C);P_SPINR(C),XP(c)
- Threat
- DUALS(2)
- Vars
- S(h);CHECK,N_GUARD::S(F),XS(h)
- S(f);N_GUARD::R1(I)
- S(f);N_GUARD::R1(I),XS(f)
- Refutation
- B(a);CHECK,XR(C)
- Try
- R(I);
- Threat
- S(H)
- Vars
- S(h);CHECK,N_GUARD::S(F),XS(h)
- S(f);N_GUARD::R1(I),XS(f)
- S(f);N_GUARD::R1(I)
- Refutation
- R(i);
- Try
- R(I);
- Threat
- S(H)
- Vars
- S(h);CHECK,N_GUARD::S(F),XS(h)
- S(f);N_GUARD::R1(I),XS(f)
- S(f);N_GUARD::R1(I)
- Refutation
- R(i);
- Try
- R(I);
- Threat
- S(H)
- Vars
- Q(b);CHECK,N_PINQ(D)::QAB1(D),XQ(b)
- S(h);CHECK,N_GUARD::S(F),XS(h)
- S(f);N_GUARD::R1(I),XS(f)
- S(f);N_GUARD::R1(I)
- Refutation
- R(i);
- Try
- Actual
- B(A);N_PINQ(b)
- Threat
- B(A),XP(g)
- Vars
- Q(b);CHECK,N_PINQ(D)::QAB1(D),XQ(b)
- Q(b);CHECK,N_PINQ(D),OGATE::R(C),XQ(b)
- Q(b);CHECK,XQ(D)::S(F),XQ(b)
- S(h);CHECK,N_GUARD::S(F),XS(h)
- Q(b);N_PINQ(D)::QAR1(D)
- Q(b);N_PINQ(D)::QAB1(D)
- S(f);N_GUARD::R1(I)
- S(f);N_GUARD::R1(I),XS(f)
- S(h);N_GUARD::S(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).