MESON Chess Problem Database
Problem Display
PID: 11495 (2B2q2/2p1rRn1/5n1B/KQ3br1/2R1PkN1/4N3/6PP/8 w - - 0 1)
Fenner, A Jack
Chess, 1939
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Rxe4
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rd7
- 2.Qe5#
- 1...Rxf7
- 2.Qe5#
- 1...Bxe4
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Be6
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 1...Bg6
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bd7
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Bh7
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxc8
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Sd5
- 2.e5#
- 1...Sfh5
- 2.e5#
- 1...Sd7
- 2.e5#
- 1...Sh7
- 2.e5#
- 1...Sfe8
- 2.e5#
- 1...Sg8
- 2.e5#
- 1...Sgh5
- 2.Qxf5#
- 1...Se6
- 2.Qe5#
- 2.Qxf5#
- 1...Sge8
- 2.Qxf5#
- 1...Rxe4
- Tries
- 1.Sd5+?
- 1...Sxd5
- 2.e5#
- 1...Kxg4!
- 1...Sxd5
- 1.Ra4?
- threat
- 2.Qf1#
- 1...Bxe4
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxc8
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Re5
- 2.Qxe5#
- 1...Be6
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 1...Bg6
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bd7
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Bh7
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Sxg4!
- threat
- 1.Rb4?
- threat
- 2.Qf1#
- 1...Bxe4
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxc8
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Re5
- 2.Qxe5#
- 1...Be6
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 1...Bg6
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bd7
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Bh7
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Sxg4!
- threat
- 1.Rd4?
- threat
- 2.Qf1#
- 1...Bxe4
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxc8
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Re5
- 2.Qxe5#
- 1...Be6
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 2.e5#
- 1...Bg6
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Bd7
- 2.Bxg5#
- 2.Qxg5#
- 2.e5#
- 1...Bh7
- 2.Sd5#
- 2.Bxg5#
- 2.Qxg5#
- 1...Sxg4!
- threat
- 1.Rxe7?
- threat
- 2.Qe5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Sxg4
- 2.Sd5#
- 2.exf5#
- 1...Sd5
- 2.exf5#
- 1...Sd7
- 2.exf5#
- 1...c5
- 2.Qb8#
- 1...Qxe7!
- threat
- 1.Rxg7?
- threat
- 2.Bxg5#
- 2.Qxf5#
- 1...Qxg7
- 2.Qxf5#
- 1...Qxc8
- 2.Bxg5#
- 1...Rxg7
- 2.Qe5#
- 2.Qxf5#
- 1...Bxe4
- 2.Bxg5#
- 2.Qf5#
- 2.Qxg5#
- 1...Bxg4
- 2.Bxg5#
- 2.Qxg5#
- 1...Bxc8
- 2.Bxg5#
- 2.Qxg5#
- 1...Sxe4
- 2.Bxg5#
- 1...Sxg4
- 2.Bxg5#
- 1...Re5
- 2.Bxg5#
- 2.Qxe5#
- 1...Be6
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 1...Bg6
- 2.Bxg5#
- 2.Qxg5#
- 1...Bd7
- 2.Bxg5#
- 2.Qxg5#
- 1...Bh7
- 2.Bxg5#
- 2.Qxg5#
- 1...Sd5
- 2.Bxg5#
- 1...Sh5
- 2.Bxg5#
- 1...Sd7
- 2.Bxg5#
- 1...Se8
- 2.Bxg5#
- 1...Sg8
- 2.Bxg5#
- 1...c5
- 2.Bxg5#
- 1...Sh7!
- threat
- 1.exf5+?
- 1...Re4
- 2.Qe5#
- 1...Se4!
- 1...Re4
- 1.e5+?
- 1...Be4
- 2.Sd5#
- 1...Se4!
- 1...Be4
- 1.Sd5+?
- Keys
- 1.Qb2!
- threat
- 2.Qf2#
- 1...Re5+
- 2.Qxe5#
- 1...Bxe4+
- 2.Sd5#
- 1...Bxg4+
- 2.Sd5#
- 1...Be6+
- 2.Qe5#
- 1...Bg6+
- 2.Sd5#
- 1...Bd7+
- 2.e5#
- 1...Bh7+
- 2.Sd5#
- 1...Bxc8+
- 2.e5#
- 1...Sxg4
- 2.Sd5#
- threat
- 1.Qb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 11
- Sets
- R(f);N_GUARD,N_SPINR(c),P_SPINR(f),XP(E)::QAB1(H)
- R(f);N_GUARD,P_PINQ(H)::QAB1(H),XR(f)
- R(f);N_GUARD::QAB1(H)
- R(f);N_GUARD,XR(J)::QAB1(H)
- S(d);N_GUARD,P_SPINB(b)::R(D)+P(E)
- S(g);N_GUARD::QAR1(H),XB(b)
- Tries
- Try
- S(C);CHECK
- Vars
- S(d);P_SPINB(b),XS(C)::R(D)+P(E)
- Refutation
- K(a);N_SPINR(c),P-FLIGHT,P_SPINB(b),XS(F)
- Try
- R(D);
- Threat
- QAR(H)
- Vars
- R(f);N_GUARD,P_PINQ(H)::QAB1(H),XR(f)
- Refutation
- S(d);P_SPINB(b),XS(F)
- Try
- R(D);
- Threat
- QAR(H)
- Vars
- R(f);N_GUARD,P_PINQ(H)::QAB1(H),XR(f)
- Refutation
- S(d);P_SPINB(b),XS(F)
- Try
- R(D);
- Threat
- QAR(H)
- Vars
- R(f);N_GUARD,P_PINQ(H)::QAB1(H),XR(f)
- Refutation
- S(d);P_SPINB(b),XS(F)
- Try
- R(J);XR(f)
- Threat
- QAB1(H)
- Vars
- S(d);N_GUARD::R(D)+P(E),XB(b)
- P(e);OGATEB::QAB(H)
- Refutation
- Q(h);XR(J)
- Try
- R(J);XS(g)
- Threat
- DUALS(2)
- Vars
- Q(h);XR(J)::QAR1(H),XB(b)
- Q(h);XB(K)::B(I),XR(c)
- S(d);P_SPINS(d),XP(E)::B(I),XR(c)
- S(d);XS(F)::B(I),XR(c)
- S(d);::B(I),XR(c)
- P(e);::B(I),XR(c)
- Refutation
- S(d);
- Try
- P(E);CHECK,XB(b)
- Vars
- R(f);N_SPINR(c),P_SPINR(f)::QAB1(H)
- Refutation
- S(d);P_SPINS(d)
- Try
- P(E);CHECK
- Vars
- B(b);P_SPINB(b),P_SPINS(d)::S(C)
- Refutation
- S(d);P_SPINB(b),P_SPINS(d)
- Try
- Actual
- Q(H);
- Threat
- QAR2(H)
- Vars
- R(f);CHECK,N_GUARD::QAB1(H),XR(f)
- B(b);CHECK,P_SPINB(b),P_SPINS(d),XP(E)::S(C)
- B(b);CHECK,P_SPINS(d),XS(F)::S(C)
- B(b);CHECK,P_SPINS(d),S_CUTR(f)::QAB1(H)
- B(b);CHECK,P_SPINS(d)::S(C)
- B(b);CHECK,N_GUARD,P_SPINS(d)::R(D)+P(E)
- B(b);CHECK,N_GUARD,P_SPINS(d),XB(K)::R(D)+P(E)
- S(d);N_GUARD,P_SPINB(b),SBLOCK,XS(F)::S(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).