MESON Chess Problem Database
Problem Display
PID: 15407 (2r5/3Q4/2nr4/4Rqp1/P1kP3R/K3B3/1P2P1P1/5B2 w - - 0 1)
McDowell, Michael
Schiffs with Everything, 1983
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rc5#
- 1...Qc2
- 2.Rc5#
- 1...Qd3+
- 2.exd3#
- 1...Qh3
- 2.Rc5#
- 1...Qe4
- 2.Rc5#
- 1...Qg4
- 2.Rc5#
- 1...Qe6
- 2.Rc5#
- 1...Qg6
- 2.Rc5#
- 1...Qxd7
- 2.Rc5#
- 1...Qh7
- 2.Rc5#
- 1...Qxf1
- 2.Rc5#
- 1...Qf2
- 2.Rc5#
- 1...Qf3
- 2.Rc5#
- 2.exf3#
- 1...Qf4
- 2.Rc5#
- 1...Qf6
- 2.Rc5#
- 1...Qf7
- 2.Rc5#
- 1...Qf8
- 2.Rc5#
- 1...Rxd4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Re6
- 2.Qd5#
- 1...Rf6
- 2.Qd5#
- 1...Rg6
- 2.Qd5#
- 1...Rh6
- 2.Qd5#
- 1...Sb4
- 2.Qb5#
- 1...Sxd4
- 2.Qb5#
- 1...Sa5
- 2.Qb5#
- 1...Sxe5
- 2.Qb5#
- 1...Se7
- 2.Qb5#
- 1...Sb8
- 2.Qb5#
- 1...Sd8
- 2.Qb5#
- 1...Qb1
- Tries
- 1.Rxf5?
- threat
- 2.Rc5#
- 1...Rxd4
- 2.Qe6#
- 2.Qd5#
- 2.Qf7#
- 1...Sxd4
- 2.Qb5#
- 1...Se5
- 2.Qb5#
- 1...Rd5
- 2.Qxd5#
- 1...Sb4
- 2.Qb5#
- 1...Sa5
- 2.Qb5#
- 1...Se7
- 2.Qb5#
- 1...Sb8
- 2.Qb5#
- 1...Sd8
- 2.Qb5#
- 1...Sa7!
- threat
- 1.Qe6+?
- 1...Qxe6
- 2.Rc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rxe6!
- 1...Qxe6
- 1.Qb7?
- threat
- 2.Qa6#
- 2.Qb3#
- 2.Qb5#
- 1...Qd3+
- 2.exd3#
- 1...Qxe5
- 2.Qb3#
- 1...Sxd4
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Sxe5
- 2.Qb3#
- 2.Qb5#
- 1...Qc2
- 2.Rc5#
- 2.Qa6#
- 2.Qb5#
- 1...Rd5
- 2.Qb3#
- 1...Ra8
- 2.Qb3#
- 2.Qb5#
- 1...Sb4
- 2.Qxb4#
- 2.Qb5#
- 1...Sa5
- 2.Qb4#
- 2.Qb5#
- 1...Sa7
- 2.Qb3#
- 2.Qb4#
- 1...Se7
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Sb8
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Sd8
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Rb8!
- threat
- 1.Qf7+?
- 1...Qe6
- 2.Rc5#
- 1...Qxf7
- 2.Rc5#
- 1...Rd5
- 2.Qxd5#
- 1...Re6!
- 1...Qe6
- 1.Rxf5?
- Keys
- 1.Bf2!
- threat
- 2.e4#
- 1...Qd3+
- 2.exd3#
- 1...Qh3+
- 2.e3#
- 1...Qf3+
- 2.exf3#
- 1...Qxf2
- 2.Rc5#
- 1...Rxd4
- 2.Qd5#
- 1...Sxd4
- 2.Qb5#
- 1...Sxe5
- 2.Qb5#
- 1...Qb1
- 2.Rc5#
- 1...Qc2
- 2.Rc5#
- 1...Qe4
- 2.Rc5#
- 1...Qg4
- 2.Rc5#
- 1...Sb4
- 2.Qb5#
- threat
- 1.Bf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 18
- Sets
- Q(b);N_GUARD::R1(J)
- Q(b);CHECK,OGATE::P(C),XQ(b)
- Q(b);N_GUARD,P_PINB(F)::R1(J)
- Q(b);N_GUARD,XQ(K)::R1(J)
- Q(b);N_GUARD,XB(A)::R1(J)
- R(e);OGATE,P_SPINR(e),XP(H)::QAB1(K)
- R(e);OGATE::QAB1(K),XR(e)
- R(e);OGATE::QAB1(K)
- S(d);OGATE::QAB1(K)
- S(d);OGATE,P_SPINS(d),XP(H)::QAB1(K)
- S(d);OGATE,XR(J)::QAB1(K)
- Tries
- Try
- R(J);XQ(b)
- Threat
- R1(J)
- Vars
- S(d);OGATE,P_SPINS(d),XP(H)::QAB1(K)
- S(d);OGATE::QAB1(K)
- R(e);OGATE::QAB1(K),XR(e)
- Refutation
- S(d);
- Try
- Q(K);CHECK
- Vars
- Q(b);XQ(K)::R1(J)
- R(e);N_GUARD,P_SPINR(e)::QAB1(K),XR(e)
- Refutation
- R(e);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,OGATE::P(C),XQ(b)
- Q(b);XR(J)::QAB1(K)
- R(e);::QAB1(K)
- Refutation
- R(f);
- Try
- Q(K);CHECK
- Vars
- Q(b);P_SPINQ(b)::R1(J)
- Q(b);XQ(K)::R1(J)
- R(e);N_GUARD,P_SPINR(e)::QAB1(K),XR(e)
- Refutation
- R(e);P_SPINR(e)
- Try
- Actual
- B(F);
- Threat
- B(A)+P(C)
- Vars
- Q(b);CHECK,OGATE::P(C),XQ(b)
- Q(b);CHECK,N_GUARD::B(A)+P(C)
- Q(b);CHECK,OGATE::B(A)+P(C),XQ(b)
- Q(b);N_GUARD,XB(F)::R1(J)
- R(e);OGATE,P_SPINR(e),XP(H)::QAB1(K)
- S(d);OGATE,P_SPINS(d),XP(H)::QAB1(K)
- S(d);OGATE,XR(J)::QAB1(K)
- Q(b);N_GUARD::R1(J)
- S(d);OGATE::QAB1(K)
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).