MESON Chess Problem Database
Problem Display
PID: 73321 (1b2R2K/1r5b/4Bkp1/R3N1Nn/4p3/8/4q2Q/2B4n w - - 0 1)
Papack, Daniel
Schach, 1990
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Sxe4#
- 1...Qf1
- 2.Sg4#
- 2.Sxe4#
- 1...Qd3
- 2.Sg4#
- 1...Qc4
- 2.Sg4#
- 1...Qg4
- 2.Sxg4#
- 1...Qb5
- 2.Sg4#
- 2.Sxe4#
- 1...Qa6
- 2.Sg4#
- 2.Sxe4#
- 1...Qe1
- 2.Sg4#
- 1...Qa2
- 2.Sg4#
- 2.Sxe4#
- 1...Qb2
- 2.Sg4#
- 2.Sxe4#
- 1...Qc2
- 2.Sg4#
- 1...Qd2
- 2.Sg4#
- 2.Sxe4#
- 1...Qf2
- 2.Sg4#
- 2.Sxe4#
- 1...Qxh2
- 2.Sg4#
- 2.Sxe4#
- 1...Qe3
- 2.Sg4#
- 1...Rb1
- 2.Sd7#
- 2.Sxh7#
- 1...Rb2
- 2.Sd7#
- 2.Sxh7#
- 1...Rb3
- 2.Sd7#
- 2.Sxh7#
- 1...Rb4
- 2.Sd7#
- 2.Sxh7#
- 1...Rb5
- 2.Sd7#
- 2.Sxh7#
- 1...Rb6
- 2.Sd7#
- 2.Sxh7#
- 1...Rd7
- 2.Sxd7#
- 1...Bxe5
- 2.Qxe5#
- 1...Bc7
- 2.Sd7#
- 2.Sxh7#
- 1...Sf4
- 2.Qxf4#
- 1...Sg7
- 2.Sxh7#
- 1...e3
- 2.Se4#
- 1...Qd1
- Tries
- 1.Bd7?
- threat
- 2.Sxh7#
- 1...Rxd7
- 2.Sxd7#
- 1...Bxe5
- 2.Qxe5#
- 1...Bg8!
- threat
- 1.Rf8+?
- 1...Rf7
- 2.Rxf7#
- 1...Ke7!
- 1...Rf7
- 1.Qxe2?
- threat
- 2.Sg4#
- 2.Sxe4#
- 1...Bxe5
- 2.Sxe4#
- 1...Rb5
- 2.Sg4#
- 2.Sd7#
- 1...e3
- 2.Sg4#
- 2.Se4#
- 1...Rb4
- 2.Sg4#
- 2.Sd7#
- 2.Sxh7#
- 1...Re7
- 2.Sg4#
- 1...S1g3
- 2.Sg4#
- 1...S5g3
- 2.Sg4#
- 1...Sf2!
- threat
- 1.Qf2+?
- 1...Qf3
- 2.Sg4#
- 2.Sxe4#
- 1...Qxf2
- 2.Sg4#
- 2.Sxe4#
- 1...Sf4
- 2.Qxf4#
- 1...Sxf2!
- 1...Qf3
- 1.Qh4?
- threat
- 2.Sxe4#
- 2.Sxh7#
- 1...Qb5
- 2.Sg4#
- 1...Rb5
- 2.Sd7#
- 1...Bg8
- 2.Sxe4#
- 2.Sh7#
- 1...e3
- 2.Se4#
- 2.Sxh7#
- 1...Re7!
- threat
- 1.Bd7?
- Keys
- 1.Bb2!
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Kxg5
- 2.Sf7#
- 1...Qxb2
- 2.Sg4#
- 2.Sxe4#
- 1...Rxb2
- 2.Sd7#
- 2.Sxh7#
- 1...Bxe5
- 2.Qxe5#
- 1...Qg4
- 2.Sxg4#
- 2.Sd7#
- 1...Qb5
- 2.Sxe4#
- 1...Rb5
- 2.Sxh7#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- threat
- 1.Bb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD::S(E),XP(c)
- Q(b);N_GUARD::S(D)
- Q(b);N_GUARD::S(D),XQ(b)
- R(g);N_GUARD::S(D),XR(g)
- B(i);OGATE,XS(D)::QAB1(B),XB(i)
- S(d);N_GUARD::QAR2(B),XS(d)
- S(d);S_CUTR(g)::S(E),XB(h)
- P(c);S_CUTQ(b)::S(E)
- Tries
- Try
- B(F);
- Threat
- S(E),XB(h)
- Vars
- R(g);XB(F)::S(D),XR(g)
- B(i);OGATE,XS(D)::QAB1(B),XB(i)
- Refutation
- B(h);
- Try
- R(G);CHECK
- Vars
- R(g);N_GUARD,P_SPINR(g)::R1(G),XR(g)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(B);XQ(b)
- Threat
- DUALS(2)
- Vars
- B(i);XS(D)::S(E),XP(c)
- R(g);::S(D)
- S(a);::S(D)
- S(d);::S(D)
- Refutation
- S(a);
- Try
- Q(B);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR2(B),XS(d)
- Refutation
- S(a);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::S(D)
- R(g);N_GUARD::S(D)
- Refutation
- R(g);
- Try
- Actual
- B(A);
- Threat
- DUALS(2)
- Vars
- K(e);S_FLIGHT,XS(E)::R(C)+S(D),DCHECK
- B(i);OGATE,P_SPINB(i),XS(D)::QAB1(B),XB(i)
- Q(b);N_GUARD::S(E),XP(c)
- R(g);N_GUARD::S(E),XB(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).