MESON Chess Problem Database
Problem Display
PID: 591 (2R3B1/1p6/1Pn5/1Q5N/3k4/P1p1nP2/4R3/2K5 w - - 0 1)
Driver, John Edward
2nd Place, The Observer, 1966
#2
9 + 5
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sf1
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sc2
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sg2
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sg4
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sd5
- 2.Re4#
- 2.Qxd5#
- 1...Sf5
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sd1
- Tries
- 1.Sf4?
- threat
- 2.Se6#
- 1...Sc4
- 2.Re4#
- 2.Qxc4#
- 2.Qd5#
- 1...Sd8
- 2.Qc5#
- 1...c2!
- threat
- 1.Rxe3?
- threat
- 2.Rd3#
- 2.Re4#
- 1...Sb4
- 2.Re4#
- 2.Qc5#
- 2.Qe5#
- 1...Se5
- 2.Re4#
- 2.Qc5#
- 2.Qxe5#
- 1...c2
- 2.Rd3#
- 1...Kxe3!
- threat
- 1.Rxc6?
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd1
- 2.Re4#
- 2.Rd6#
- 2.Qc4#
- 2.Qd5#
- 1...Sf1
- 2.Re4#
- 2.Rd6#
- 2.Qc4#
- 2.Qd5#
- 1...Sc2
- 2.Re4#
- 2.Rd6#
- 2.Qc4#
- 2.Qd5#
- 1...Sg2
- 2.Re4#
- 2.Rd6#
- 2.Qc4#
- 2.Qd5#
- 1...Sg4
- 2.Re4#
- 2.Rd6#
- 2.Qc4#
- 2.Qd5#
- 1...Sd5
- 2.Re4#
- 2.Qc4#
- 2.Qxd5#
- 1...Sf5
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...c2
- 2.Rd2#
- 1...bxc6!
- 1...Sc4
- 1.Rd8+?
- 1...Sd5
- 2.Re4#
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxd8!
- 1...Sd5
- 1.Rf8?
- threat
- 2.Rf4#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sg2
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...Sd5
- 2.Re4#
- 2.Qxd5#
- 1...Sf5
- 2.Re4#
- 2.Qc4#
- 2.Qd5#
- 1...c2!
- threat
- 1.Qa4+?
- 1...Kd3
- 2.Sf4#
- 1...Kc5
- 2.Qb4#
- 1...Ke5
- 2.Qf4#
- 1...Sc4
- 2.Qxc4#
- 1...Sb4!
- 1...Kd3
- 1.Qc4+?
- 1...Ke5
- 2.Qd5#
- 2.Qf4#
- 2.Qc5#
- 1...Sxc4!
- 1...Ke5
- 1.Qb4+?
- 1...Kd3
- 2.Sf4#
- 1...Ke5
- 2.Qc5#
- 2.Qf4#
- 1...Sc4
- 2.Qxc4#
- 1...Sxb4!
- 1...Kd3
- 1.Qc5+?
- 1...Kd3
- 2.Sf4#
- 2.Rxe3#
- 2.Qxe3#
- 1...Kxc5!
- 1...Kd3
- 1.Qg5?
- threat
- 2.Qxe3#
- 1...Kd3
- 2.Qxe3#
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sf5!
- threat
- 1.Sf4?
- Keys
- 1.Qb3!
- 1...Kd3
- 2.Rd2#
- 1...Kc5
- 2.Qb4#
- 1...Ke5
- 2.Qd5#
- 1...Sb4
- 2.Qxc3#
- 1...Sd1
- 2.Qc4#
- 2.Qd5#
- 1...Sf1
- 2.Qc4#
- 2.Qd5#
- 1...Sc2
- 2.Qc4#
- 2.Qd5#
- 1...Sg2
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 1...Sg4
- 2.Qc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qc4#
- 2.Qd5#
- 1...Sa5
- 2.Qxc3#
- 1...Se5
- 2.Qxc3#
- 1...Sa7
- 2.Qxc3#
- 1...Se7
- 2.Qxc3#
- 1...Sb8
- 2.Qxc3#
- 1...Sd8
- 2.Qxc3#
- 1...c2
- 2.Qxe3#
- 1...Kd3
- 1.Qb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 13
- REMOVED MATES = 0
- Sets
- Tries
- Try
- S(F);
- Threat
- S(F)
- Vars
- S(d);::QAB1(E)
- Refutation
- P(a);
- Try
- R(B);XS(b)
- Threat
- DUALS(2)
- Vars
- P(a);::R1(B)
- Refutation
- K(c);S_FLIGHT,XR(B)
- Try
- R(H);XS(d)
- Vars
- P(a);N_GUARD::R(B)
- Refutation
- P(e);XR(H)
- Try
- R(H);CHECK
- Refutation
- S(d);XR(H)
- Try
- R(H);
- Threat
- R(H)
- Refutation
- P(a);
- Try
- Q(E);CHECK
- Vars
- K(c);P-FLIGHT::S(F)
- K(c);P_SPINS(d),S_FLIGHT::QAB1(E)
- K(c);OGATE,P_SPINS(b),S_FLIGHT::QAB1(E)
- S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
- Refutation
- S(d);P_SPINS(d)
- Try
- Q(E);CHECK
- Refutation
- S(b);XQ(E)
- Try
- Q(E);CHECK
- Vars
- K(c);P-FLIGHT::S(F)
- S(b);N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
- Refutation
- S(d);XQ(E)
- Try
- Q(E);CHECK
- Refutation
- K(c);P_SPINS(d),S_FLIGHT,XQ(E)
- Try
- Q(E);
- Threat
- QAB1(E),XS(b)
- Vars
- K(c);P-FLIGHT::QAR1(E),XS(b)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(b);N_GUARD::QAR1(E)
- Refutation
- S(b);
- Try
- Actual
- Q(E);
- Vars
- K(c);P-FLIGHT,P_SPINP(a)::R1(B)
- K(c);P_SPINS(d),S_FLIGHT::QAB1(E)
- K(c);P_SPINS(b),S_FLIGHT::QAR1(E)
- S(d);::QAB1(E),XP(a)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(d);SBLOCK::QAB1(E),XP(a)
- P(a);OGATE::QAB1(E),XS(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).