MESON Chess Problem Database
Problem Display
PID: 80717 (B1n1R3/4b3/1rn3pN/2Qr4/R2pkP2/Kbp1N1P1/4P3/6B1 w - - 0 1)
Onkoud, Abdelaziz
4th Prize, Liberte-Dimanche, 1997-1998
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Rxd4#
- 1...Rf5
- 2.Rxd4#
- 1...Rg5
- 2.Rxd4#
- 1...Rh5
- 2.Rxd4#
- 1...Rd6
- 2.Qe5#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...S6a7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sd8
- 2.Rxd4#
- 1...Re5
- Tries
- 1.Sxd5?
- threat
- 2.Sxc3#
- 2.Sf6#
- 1...Bxa4
- 2.Sf6#
- 1...Rb4
- 2.Sf6#
- 1...Bc4
- 2.Sf6#
- 1...c2
- 2.Sc3#
- 2.Sf6#
- 1...Bxd5!
- threat
- 1.Shg4?
- threat
- 2.Sf6#
- 1...Re5
- 2.Rxd4#
- 1...Rf5
- 2.Rxd4#
- 1...Rd6
- 2.Qe5#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...S6a7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sd8
- 2.Rxd4#
- 1...Sb4!
- threat
- 1.Sg8?
- threat
- 2.Sf6#
- 1...Re5
- 2.Rxd4#
- 1...Rf5
- 2.Rxd4#
- 1...Rd6
- 2.Qe5#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...S6a7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sd8
- 2.Rxd4#
- 1...Sb4!
- threat
- 1.Rxe7+?
- 1...Re5
- 2.Rxd4#
- 2.Rxe5#
- 2.Qxd4#
- 2.Qxe5#
- 1...Se5
- 2.Rxd4#
- 2.Rxe5#
- 2.Qxd4#
- 1...S6xe7
- 2.Rxd4#
- 2.Qxd4#
- 1...S8xe7!
- 1...Re5
- 1.Sxd5?
- Keys
- 1.Seg4!
- threat
- 2.Sf6#
- 1...Re5
- 2.Rxd4#
- 1...Rf5
- 2.Rxd4#
- 1...Rd6
- 2.Qe5#
- 1...Sb4
- 2.Qxd4#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...S6a7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sd8
- 2.Rxd4#
- threat
- 1.Seg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(e);N_GUARD,N_SPINB(i),P_SPINS(g)::R1(F),XP(c)
- R(e);N_GUARD,P_SPINS(g)::R1(F),XP(c)
- R(e);N_PINQ(H),P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(e)::R1(F),XP(c)
- S(g);N_GUARD,N_SPINB(i),P_SPINR(e)::R1(F),XP(c)
- Tries
- Try
- S(D);XR(e)
- Threat
- DUALS(2)
- Vars
- B(a);N_SPINP(c),XR(F)::S(D)
- R(f);N_PINQ(H),N_SPINP(c)::S(D)
- B(a);N_SPINP(c)::S(D)
- Refutation
- B(a);XS(D)
- Try
- S(I);
- Threat
- S(I)
- Vars
- R(e);N_GUARD,N_SPINB(i),P_SPINS(g)::R1(F),XP(c)
- R(e);N_GUARD,P_SPINS(g)::R1(F),XP(c)
- R(e);N_PINQ(H),P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(e)::R1(F),XP(c)
- S(g);N_GUARD,N_SPINB(i),P_SPINR(e)::R1(F),XP(c)
- Refutation
- S(g);N_PINQ(H),N_SPINP(c),P_SPINR(e)
- Try
- S(I);
- Threat
- S(I)
- Vars
- R(e);N_GUARD,N_SPINB(i),P_SPINS(g)::R1(F),XP(c)
- R(e);N_GUARD,P_SPINS(g)::R1(F),XP(c)
- R(e);N_PINQ(H),P_SPINS(g)::QAR1(H)
- S(g);N_GUARD,P_SPINR(e)::R1(F),XP(c)
- S(g);N_GUARD,N_SPINB(i),P_SPINR(e)::R1(F),XP(c)
- Refutation
- S(g);N_PINQ(H),N_SPINP(c),P_SPINR(e)
- Try
- R(K);CHECK,N_SPINQ(H),XB(i)
- Refutation
- S(j);XR(K)
- Try
- Actual
- S(D);
- Threat
- S(D)
- Vars
- R(e);N_GUARD,N_SPINB(i),P_SPINS(g)::R1(F),XP(c)
- R(e);N_GUARD,P_SPINS(g)::R1(F),XP(c)
- R(e);N_PINQ(H),P_SPINS(g)::QAR1(H)
- S(g);N_PINQ(H),N_SPINP(c),P_SPINR(e)::QAR1(H),XP(c)
- S(g);N_GUARD,P_SPINR(e)::R1(F),XP(c)
- S(g);N_GUARD,N_SPINB(i),P_SPINR(e)::R1(F),XP(c)
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).