MESON Chess Problem Database
Problem Display
PID: 10561 (3bR1Q1/7b/2N5/3p1n2/2nN1kPP/3r2R1/q3rPBK/8 w - - 0 1)
Quack, Godfrey C
The Problemist, 1965
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxe2#
- 1...Qb3
- 2.Sxe2#
- 1...Qa1
- 2.Sxe2#
- 1...Qa3
- 2.Sxe2#
- 1...Qa4
- 2.Sxe2#
- 1...Qa5
- 2.Sxe2#
- 1...Qa6
- 2.Sxe2#
- 1...Qa7
- 2.Sxe2#
- 1...Qa8
- 2.Sxe2#
- 1...Rb2
- 2.Se6#
- 1...Rc2
- 2.Se6#
- 1...Red2
- 2.Se6#
- 1...Rxf2
- 2.Se6#
- 1...Re6
- 2.Sxe6#
- 1...Re7
- 2.Qg5#
- 1...Rd1
- 2.Rf3#
- 1...Rdd2
- 2.Rf3#
- 1...Rf3
- 2.Rxf3#
- 1...Rxd4
- 2.Rf3#
- 1...Ba5
- 2.Qg5#
- 1...Bg5
- 2.Qxg5#
- 1...Bb6
- 2.Qg5#
- 1...Bc7
- 2.Qg5#
- 1...Sb2
- 2.Sxe2#
- 1...Sd2
- 2.Sxe2#
- 1...Sce3
- 2.Se6#
- 2.Rf3#
- 1...Se5
- 2.Se6#
- 1...Sfe3
- 2.Se6#
- 2.Rf3#
- 1...Se7
- 2.Qg5#
- 1...Qb1
- Tries
- 1.Re4+?
- 1...dxe4
- 2.Se6#
- 1...Rxe4!
- 1...dxe4
- 1.Re4+?
- Keys
- 1.Sb4!
- threat
- 2.Sxd3#
- 2.Sxd5#
- 1...Rxe8
- 2.Sxd3#
- 1...Rxg3
- 2.Sxd5#
- 1...Rxd4
- 2.Rf3#
- 1...Bxg8
- 2.Sxd3#
- 1...Sxg3
- 2.Sxd5#
- 1...Sxd4
- 2.Sxd5#
- 1...Sxh4
- 2.Sxd5#
- 1...Re6
- 2.Sxd3#
- 1...Re7
- 2.Sxd3#
- 1...Be7
- 2.Sxd3#
- 1...Se7
- 2.Qg5#
- 1...Qb1
- 2.Sxd5#
- 2.Sxe2#
- 1...Qb3
- 2.Sxd5#
- 2.Sxe2#
- 1...Qc2
- 2.Sxd5#
- 1...Qd2
- 2.Sxd5#
- 1...Qa3
- 2.Sxd5#
- 2.Sxe2#
- 1...Qa5
- 2.Sxd3#
- 2.Sxe2#
- 1...Qa8
- 2.Sxd3#
- 2.Sxe2#
- 1...Red2
- 2.Sxd5#
- 1...Ree3
- 2.Sxd5#
- 1...Re5
- 2.Sxd3#
- 1...Rd1
- 2.Sxd5#
- 2.Rf3#
- 1...Rdd2
- 2.Sxd5#
- 2.Rf3#
- 1...Ra3
- 2.Sxd5#
- 1...Rb3
- 2.Sxd5#
- 1...Rc3
- 2.Sxd5#
- 1...Rde3
- 2.Sxd5#
- 1...Rf3
- 2.Sxd5#
- 2.Rxf3#
- 1...Sb2
- 2.Sxe2#
- 1...Sd2
- 2.Sxd3#
- 2.Sxe2#
- 1...Sa3
- 2.Sxd3#
- 1...Sce3
- 2.Sxd3#
- 2.Rf3#
- 1...Sa5
- 2.Sxd3#
- 1...Se5
- 2.Se6#
- 1...Sb6
- 2.Sxd3#
- 1...Scd6
- 2.Sxd3#
- 1...Sfe3
- 2.Rf3#
- 1...Sfd6
- 2.Sxd5#
- 1...Sh6
- 2.Sxd5#
- 1...Sg7
- 2.Sxd5#
- threat
- 1.Sb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 23
- REMOVED MATES = 20
- Sets
- Q(a);N_GUARD::S(E),XR(b)
- R(b);N_GUARD::S(E)
- R(b);N_GUARD,P_PINB(B),XP(A)::S(E)
- R(b);N_GUARD::S(E),XR(b)
- R(b);S_CUTB(i)::QAB1(J)
- R(c);N_GUARD::R1(D)
- R(c);N_GUARD::R1(D),XR(c)
- R(c);N_GUARD,XS(E)::R1(D)
- B(i);N_GUARD::QAB1(J)
- B(i);N_GUARD::QAB1(J),XB(i)
- S(d);S_CUTQ(a)::S(E),XR(b)
- S(d);S_CUTR(b)::S(E)
- S(g);S_CUTB(i)::QAB1(J)
- Tries
- Try
- R(I);CHECK
- Vars
- P(f);XR(I)::S(E)
- Refutation
- R(b);XR(I)
- Try
- Actual
- S(H);
- Threat
- DUALS(2)
- Vars
- R(b);XR(I)::S(H),XR(c)
- R(c);XR(D)::S(H),XP(f)
- R(c);N_GUARD,XS(E)::R1(D)
- B(h);XQ(J)::S(H),XR(c)
- S(g);XR(D)::S(H),XP(f)
- S(g);XS(E)::S(H),XP(f)
- S(g);XP(G)::S(H),XP(f)
- R(b);::S(H),XR(c)
- B(i);::S(H),XR(c)
- S(g);S_CUTB(i)::QAB1(J)
- Q(a);::S(H),XP(f)
- R(b);::S(H),XP(f)
- R(c);::S(H),XP(f)
- S(d);S_CUTQ(a)::S(E),XR(b)
- S(d);::S(H),XR(c)
- S(d);SBLOCK,S_CUTR(b)::S(E)
- S(g);S_CUTR(c)::R1(D)
- S(g);::S(H),XP(f)
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).