MESON Chess Problem Database
Problem Display
PID: 20921 (1b2n2Q/n1p5/K3Rr2/8/1BPk3p/N2B1pp1/7r/2RbN3 w - - 0 1)
Chandler, Guy Wills
3rd Place, Four-Leaved Shamrock (Easter Ty.), 1914
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Be2
- 2.Sac2#
- 1...Sb5
- 2.Sxb5#
- 1...Sc6
- 2.Sb5#
- 2.Re4#
- 1...Sc8
- 2.Sb5#
- 1...Sd6
- 2.Qxf6#
- 1...Sg7
- 2.Qd8#
- 1...c5
- 2.Bc3#
- 1...c6
- 2.Re4#
- 1...Be2
- Tries
- 1.Sxf3+?
- 1...Kxd3
- 2.Rc3#
- 1...Bxf3!
- 1...Kxd3
- 1.Rxd1?
- threat
- 2.Sxf3#
- 2.Be2#
- 1...Re2
- 2.Sxf3#
- 2.Bxe2#
- 1...Ra2
- 2.Sxf3#
- 2.Bc2#
- 1...Rb2
- 2.Sxf3#
- 2.Bc2#
- 1...Rc2
- 2.Sexc2#
- 2.Sxf3#
- 2.Saxc2#
- 2.Bxc2#
- 1...Rf2
- 2.Be2#
- 1...Sg7
- 2.Be2#
- 2.Qd8#
- 1...f2
- 2.Sec2#
- 2.Sf3#
- 2.Sac2#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bf5#
- 2.Bg6#
- 2.Bh7#
- 1...Rd2!
- threat
- 1.Qxh4+?
- 1...Rf4
- 2.Qxf4#
- 1...Rxh4!
- 1...Rf4
- 1.Qh5?
- threat
- 2.Bc3#
- 2.Bc5#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Re2
- 2.Bc3#
- 2.Bc5#
- 2.Qc5#
- 2.Qd5#
- 1...Rc2
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rf5
- 2.Re4#
- 1...Bc2
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sb5
- 2.Sxb5#
- 2.Bc5#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sc6
- 2.Sb5#
- 2.Bc3#
- 2.Bc5#
- 2.Re4#
- 2.Qc5#
- 2.Qd5#
- 1...c5
- 2.Bc3#
- 2.Bxc5#
- 2.Qxc5#
- 2.Qd5#
- 1...c6
- 2.Bc3#
- 2.Bc5#
- 2.Re4#
- 2.Qc5#
- 1...Rxe6+!
- threat
- 1.Qf8?
- threat
- 2.Bc3#
- 2.Bc5#
- 2.Qc5#
- 1...Rxf8
- 2.Re4#
- 1...Rc2
- 2.Qc5#
- 1...Rf5
- 2.Bc3#
- 2.Re4#
- 1...Bc2
- 2.Qc5#
- 1...Sb5
- 2.Sxb5#
- 2.Bc5#
- 2.Qc5#
- 1...Sd6
- 2.Qxf6#
- 1...c5
- 2.Bc3#
- 2.Bxc5#
- 2.Qxc5#
- 1...Rxe6+!
- threat
- 1.Sxf3+?
- Keys
- 1.Bf5!
- 1...Re2
- 2.Sxf3#
- 1...Rh1
- 2.Rxd1#
- 1...Ra2
- 2.Qxh4#
- 1...Rb2
- 2.Qxh4#
- 1...Rc2
- 2.Qxh4#
- 1...Rd2
- 2.Qxh4#
- 1...Rf2
- 2.Qxh4#
- 1...Rg2
- 2.Qxh4#
- 1...Rh3
- 2.Rxd1#
- 1...Bc2
- 2.Sxf3#
- 1...Be2
- 2.Sec2#
- 1...Bb3
- 2.Sxf3#
- 1...Ba4
- 2.Sxf3#
- 1...Sb5
- 2.Sxb5#
- 1...Sc6
- 2.Sb5#
- 2.Re4#
- 1...Sc8
- 2.Sb5#
- 1...Sd6
- 2.Qxf6#
- 1...Sg7
- 2.Qd8#
- 1...f2
- 2.Rxd1#
- 1...g2
- 2.Rxd1#
- 1...h3
- 2.Qh4#
- 1...c5
- 2.Bc3#
- 1...c6
- 2.Re4#
- 1...Re2
- 1.Bf5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 15
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD,S_CUTR(b)::S(C)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- S(k);N_GUARD,N_PINR(H)::QAB(I),XR(g)
- S(k);N_SPINR(g),OGATE::QAR(I)
- P(i);SBLOCK::B(E)
- P(i);N_PINR(H)::R1(H)
- Tries
- Try
- S(B);CHECK,XP(c)
- Vars
- K(e);N_SPINR(g),P-FLIGHT,XB(D)::R1(A)
- Refutation
- B(a);XS(B)
- Try
- R(A);XB(a)
- Threat
- DUALS(2)
- Vars
- R(b);::R(A)+B(D)
- Refutation
- R(b);
- Try
- Q(I);CHECK,N_PINR(g),XP(f)
- Vars
- R(g);N_GUARD,N_PINR(H),P_SPINR(g)::QAR2(I),XR(g)
- Refutation
- R(b);XQ(I)
- Try
- Q(I);N_PINR(g)
- Threat
- DUALS(5)
- Vars
- R(g);N_PINR(H)::R1(H)
- Refutation
- R(g);CHECK,XR(H)
- Try
- Q(I);N_PINR(g)
- Threat
- DUALS(3)
- Vars
- R(g);N_PINR(H),XQ(I)::R1(H)
- R(b);::QAB1(I)
- B(a);::QAB1(I)
- S(k);N_GUARD,N_PINR(H)::QAB(I),XR(g)
- Refutation
- R(g);CHECK,XR(H)
- Try
- Actual
- B(D);
- Vars
- R(b);S_CUTB(a)::S(B),XP(c)
- R(b);N_GUARD::R(A),XB(a)
- R(b);N_GUARD,P_PINS(C)::QAR(I),XP(f)
- R(b);N_GUARD::QAR(I),XP(f)
- B(a);N_GUARD::S(B),XP(c)
- B(a);N_GUARD,P_PINP(F),S_CUTR(b)::S(B)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- S(k);N_GUARD,N_PINR(H)::QAB(I),XR(g)
- S(k);N_SPINR(g),OGATE::QAR(I)
- P(c);S_CUTR(b)::R(A),XB(a)
- P(d);S_CUTR(b)::R(A),XB(a)
- P(f);S_CUTR(b)::QAR(I)
- P(i);SBLOCK::B(E)
- P(i);N_PINR(H)::R1(H)
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).