MESON Chess Problem Database
Problem Display
PID: 183407 (6QK/8/8/1p1rpnbN/1P2k1p1/1N1pP1p1/3P2P1/5R2 w - - 0 1)
Fenner, A Jack
The Problemist, 1943
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Rd8
- 2.Sc5#
- 1...Bxe3
- 2.Sf6#
- 1...Bf4
- 2.Sf6#
- 1...Bh4
- 2.Qxg4#
- 1...Bf6+
- 2.Sxf6#
- 1...Bh6
- 2.Sf6#
- 1...Be7
- 2.Qxg4#
- 1...Bd8
- 2.Qxg4#
- 1...Sxe3
- 2.Sxg3#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...Rd4
- Tries
- 1.Kh7?
- 1...Bxe3
- 2.Sf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd8
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 1...Bh4
- 2.Qxg4#
- 1...Bf6
- 2.Sxf6#
- 2.Qxg4#
- 1...Bh6
- 2.Sf6#
- 1...Be7
- 2.Qxg4#
- 1...Bd8
- 2.Qxg4#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...Rd7+!
- 1...Bxe3
- 1.Rf2?
- 1...Bf6+
- 2.Sxf6#
- 1...Bxe3
- 2.Sf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Rd8
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 1...Bh4
- 2.Qxg4#
- 1...Bh6
- 2.Sf6#
- 1...Be7
- 2.Qxg4#
- 1...Bd8
- 2.Qxg4#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...gxf2!
- 1...Bf6+
- 1.Rf3?
- 1...Bf6+
- 2.Sxf6#
- 1...Bxe3
- 2.Sf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Rd8
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 1...Bh4
- 2.Qxg4#
- 1...Bh6
- 2.Sf6#
- 1...Be7
- 2.Qxg4#
- 1...Bd8
- 2.Qxg4#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...gxf3!
- 1...Bf6+
- 1.Rf4+?
- 1...Bxf4
- 2.Sf6#
- 1...exf4!
- 1...Bxf4
- 1.Qe6?
- threat
- 2.Qxf5#
- 1...Bf6+
- 2.Sxf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 2.Rxf4#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...Rd8+!
- threat
- 1.Qf7?
- threat
- 2.Qxf5#
- 1...Bf6+
- 2.Sxf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...Rd8+!
- threat
- 1.Qa8?
- threat
- 2.Sc5#
- 1...Bf6+
- 2.Sxf6#
- 1...Bxe3
- 2.Sf6#
- 1...Sxe3
- 2.Sxg3#
- 1...Be7!
- threat
- 1.Kh7?
- Keys
- 1.Re1!
- 1...Bf6+
- 2.Sxf6#
- 1...Bxe3
- 2.Qxg4#
- 1...Sxe3
- 2.Qh7#
- 2.Qg6#
- 1...Sd4
- 2.Sxg3#
- 1...Sh4
- 2.Sxg3#
- 1...Sd6
- 2.Sxg3#
- 1...Sh6
- 2.Sxg3#
- 1...Se7
- 2.Sxg3#
- 1...Sg7
- 2.Sxg3#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rd6
- 2.Sc5#
- 1...Rd7
- 2.Sc5#
- 1...Rd8
- 2.Sc5#
- 1...Bf4
- 2.Sf6#
- 1...Bh4
- 2.Qxg4#
- 1...Bh6
- 2.Sf6#
- 1...Be7
- 2.Qxg4#
- 1...Bd8
- 2.Qxg4#
- 1...Bf6+
- 1.Re1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- R(f);N_GUARD,P_PINQ(H)::S(D)
- B(i);N_GUARD,XP(E)::S(G)
- B(i);N_GUARD::S(G)
- B(i);OGATE::QAR2(H),XP(d)
- B(i);CHECK,N_GUARD::S(G),XB(i)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- S(h);N_GUARD::S(G),XP(b)
- Tries
- Try
- K(I);P-FLIGHT
- Vars
- B(i);N_GUARD,XP(E)::S(G)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- B(i);N_GUARD::S(G)
- B(i);OGATE::QAR2(H),XP(d)
- S(h);N_GUARD::S(G),XP(b)
- Refutation
- R(f);CHECK
- Try
- R(A);
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- B(i);N_GUARD,XP(E)::S(G)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- R(f);N_GUARD,P_PINQ(H)::S(D)
- B(i);N_GUARD::S(G)
- B(i);OGATE::QAR2(H),XP(d)
- S(h);N_GUARD::S(G),XP(b)
- Refutation
- P(b);XR(A)
- Try
- R(A);
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- B(i);N_GUARD,XP(E)::S(G)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- R(f);N_GUARD,P_PINQ(H)::S(D)
- B(i);N_GUARD::S(G)
- B(i);OGATE::QAR2(H),XP(d)
- S(h);N_GUARD::S(G),XP(b)
- Refutation
- P(d);XR(A)
- Try
- R(A);CHECK
- Vars
- B(i);XR(A)::S(G)
- Refutation
- P(g);XR(A)
- Try
- Q(H);P_PINP(g)
- Threat
- QAB1(H),XS(h)
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- S(h);N_GUARD::S(G),XP(b)
- Refutation
- R(f);CHECK
- Try
- Q(H);
- Threat
- QAB1(H),XS(h)
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- B(i);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XP(b)
- Refutation
- R(f);CHECK
- Try
- Q(H);P_PINR(f)
- Threat
- S(D)
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- B(i);N_GUARD,XP(E)::S(G)
- S(h);N_GUARD,XP(E)::S(G),XP(b)
- Refutation
- B(i);
- Try
- Actual
- R(A);
- Vars
- B(i);CHECK,N_GUARD::S(G),XB(i)
- B(i);OGATE,P_SPINB(i),XP(E)::QAR2(H),XP(d)
- S(h);N_GUARD::S(G),XP(b)
- R(f);N_GUARD::S(D)
- R(f);N_GUARD::S(D),XR(f)
- R(f);N_GUARD,P_PINQ(H)::S(D)
- B(i);N_GUARD::S(G)
- B(i);OGATE::QAR2(H),XP(d)
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).