MESON Chess Problem Database
Problem Display
PID: 178130 (3r4/1N3qpN/2B5/r2RBpQ1/ppb1knP1/1Rn2p2/2PP3b/7K w - - 0 1)
Hoy, Paul
Schach-Echo, 1938
#2
11 + 13
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Qxf5#
- 1...Qe8
- 2.Qxf5#
- 1...Qg8
- 2.Qxf5#
- 1...Qxb7
- 2.Qxf5#
- 1...Qc7
- 2.Qxf5#
- 1...Qe7
- 2.Qxf5#
- 1...Rc5
- 2.Sxc5#
- 1...Ra6
- 2.Sc5#
- 1...Ra7
- 2.Sc5#
- 1...Raa8
- 2.Sc5#
- 1...Rd6
- 2.Sxd6#
- 1...Rda8
- 2.Sd6#
- 1...Rb8
- 2.Sd6#
- 1...Rc8
- 2.Sd6#
- 1...Re8
- 2.Sd6#
- 1...Rf8
- 2.Sd6#
- 1...Rg8
- 2.Sd6#
- 1...Rh8
- 2.Sd6#
- 1...Bg1
- 2.Qxf4#
- 1...Bb5
- 2.Sc5#
- 1...Sb1
- 2.Re3#
- 1...Sa2
- 2.Re3#
- 1...Sce2
- 2.Re3#
- 1...Sb5
- 2.Sc5#
- 2.Re3#
- 1...Scxd5
- 2.Re3#
- 1...Sfe2
- 2.Qe3#
- 1...Sd3
- 2.Qe3#
- 1...Sh3
- 2.Qe3#
- 1...Sfxd5
- 2.Qe3#
- 1...Sh5
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 1...Sg6
- 2.Qe3#
- 1...fxg4
- 2.Rd4#
- 1...Qxd5
- Tries
- 1.Sf6+?
- 1...gxf6
- 2.Qxf5#
- 1...Qxf6!
- 1...gxf6
- 1.Bxc3?
- threat
- 2.Re5#
- 1...Qxd5
- 2.Qxf5#
- 1...Raxd5
- 2.Sc5#
- 1...Rdxd5
- 2.Sd6#
- 1...Bxd5
- 2.Rxb4#
- 1...Sxd5
- 2.Qe3#
- 1...bxc3!
- threat
- 1.Bf6?
- threat
- 2.Rd4#
- 2.Qxf5#
- 1...Qxd5
- 2.Qxf5#
- 1...Raxd5
- 2.Sc5#
- 2.Qxf5#
- 1...Rdxd5
- 2.Sd6#
- 2.Qxf5#
- 1...Bxd5
- 2.Rxb4#
- 2.Qxf5#
- 1...Scxd5
- 2.Re3#
- 2.Qxf5#
- 1...Sfxd5
- 2.Qe3#
- 2.Qxf5#
- 1...fxg4
- 2.Rd4#
- 2.Qe5#
- 2.Qf5#
- 1...gxf6
- 2.Qxf5#
- 1...f2
- 2.Rd4#
- 1...Qh5
- 2.Rd4#
- 1...Qe6
- 2.Rd4#
- 1...Qg6
- 2.Rd4#
- 1...Qd7
- 2.Rd4#
- 1...g6
- 2.Rd4#
- 1...Qxf6!
- threat
- 1.Rd3+?
- 1...Qd5
- 2.Re3#
- 2.Qxf5#
- 1...Rad5
- 2.Re3#
- 1...Rdd5
- 2.Re3#
- 1...Bd5
- 2.Re3#
- 1...Scd5
- 2.Re3#
- 1...Sfd5
- 2.Re3#
- 2.Qe3#
- 1...Kxe5!
- 1...Qd5
- 1.Sf6+?
- Keys
- 1.Bxg7!
- threat
- 2.Rd4#
- 1...Qxd5
- 2.Qxf5#
- 1...Qxg7
- 2.Qxf5#
- 1...Raxd5
- 2.Sc5#
- 1...Rdxd5
- 2.Sd6#
- 1...Bxd5
- 2.Rxb4#
- 1...Scxd5
- 2.Re3#
- 1...Sfxd5
- 2.Qe3#
- 1...Qf6
- 2.Sxf6#
- threat
- 1.Bxg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 29
- Sets
- Q(k);N_GUARD,P_SPINQ(k),XR(F)::QAB1(H),XP(j)
- Q(k);N_GUARD::QAB1(H),XP(j)
- Q(k);N_GUARD,XS(J)::QAB1(H),XP(j)
- R(i);N_GUARD::S(J),XR(i)
- R(i);N_GUARD::S(J)
- R(m);N_GUARD::S(J),XR(m)
- R(m);N_GUARD::S(J)
- B(a);N_GUARD::QAR1(H),XS(h)
- B(f);S_CUTR(i)::S(J)
- S(b);OGATE::R1(D)
- S(b);OGATE,P_SPINS(b),XR(F)::R1(D)
- S(h);OGATE::QAR1(H)
- S(h);OGATE,P_SPINS(h),XR(F)::QAR1(H)
- P(j);XP(E)::B(I)+R(F),DCHECK
- Tries
- Try
- S(K);CHECK
- Vars
- P(l);XS(K)::QAB1(H),XP(j)
- Refutation
- Q(k);XS(K)
- Try
- B(G);XS(b)
- Threat
- B(I)+R(F),DCHECK
- Vars
- Q(k);N_GUARD,P_SPINQ(k),XR(F)::QAB1(H),XP(j)
- R(i);N_GUARD,P_SPINR(i),XR(F)::S(J)
- R(m);N_GUARD,P_SPINR(m),XR(F)::S(J)
- B(f);OGATEB,P_SPINB(f),XR(F)::R(D),XP(e)
- S(h);OGATE,P_SPINS(h),XR(F)::QAR1(H)
- Refutation
- P(e);XB(G)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(k);P_SPINQ(k),XR(F)::QAB1(H),XP(j)
- P(l);XB(G)::QAB1(H),XP(j)
- P(c);::B(I)+R(F),DCHECK
- Q(k);::B(I)+R(F),DCHECK
- P(l);::B(I)+R(F),DCHECK
- Refutation
- Q(k);XB(G)
- Try
- R(F);CHECK
- Vars
- R(i);P_SPINR(i)::R1(F)
- R(m);P_SPINR(m)::R1(F)
- B(f);P_SPINB(f)::R1(F)
- S(b);P_SPINS(b)::R1(F)
- Refutation
- K(g);P-FLIGHT,P_SPINP(j),XB(G)
- Try
- Actual
- B(G);XP(l)
- Threat
- B(I)+R(F),DCHECK
- Vars
- Q(k);N_GUARD,P_SPINQ(k),XR(F)::QAB1(H),XP(j)
- Q(k);N_GUARD,XB(G)::QAB1(H),XP(j)
- R(i);N_GUARD,P_SPINR(i),XR(F)::S(J)
- R(m);N_GUARD,P_SPINR(m),XR(F)::S(J)
- B(f);OGATEB,P_SPINB(f),XR(F)::R(D),XP(e)
- S(b);OGATE,P_SPINS(b),XR(F)::R1(D)
- S(h);OGATE,P_SPINS(h),XR(F)::QAR1(H)
- Q(k);N_GUARD::S(K),XQ(k)
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).