MESON Chess Problem Database
Problem Display
PID: 114184 (n2RK2b/2p2R1r/2N1kpP1/4Nn1q/brP3BB/1p1P1P2/8/4Q3 w - - 0 1)
Stocchi, Ottavio
Sah, 1950
#2
12 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxg6
- 2.Sxg6#
- 1...Rxc4
- 2.Sxc4#
- 1...Rb5
- 2.Sd4#
- 1...Rh6
- 2.Re7#
- 1...Rxf7
- 2.Sxf7#
- 1...Rg7
- 2.Rxf6#
- 1...Bxc6+
- 2.Sxc6#
- 1...Bg7
- 2.Re7#
- 1...Qxg6
- Tries
- 1.Rfd7?
- threat
- 2.Sf7#
- 2.Sd4#
- 1...Qxg6+
- 2.Sxg6#
- 2.Sf7#
- 1...Re7+
- 2.Rxe7#
- 1...Qxh4
- 2.Sd4#
- 1...Rxc4
- 2.Sxc4#
- 1...Rxd7
- 2.Sf7#
- 1...Bxc6
- 2.Sxc6#
- 1...fxe5
- 2.Sd4#
- 1...Qg5
- 2.Sd4#
- 1...Qh6
- 2.Sd4#
- 1...Rb5
- 2.Sd4#
- 1...Rf7
- 2.Sxf7#
- 2.Sd4#
- 1...Qxg4!
- threat
- 1.Rxh7?
- threat
- 2.Sf7#
- 2.Re7#
- 1...Qxg6+
- 2.Sxg6#
- 2.Sf7#
- 1...Bxc6+
- 2.Sxc6#
- 1...Qxh4
- 2.Re7#
- 1...Qxh7
- 2.Sf7#
- 1...Rxc4
- 2.Sxc4#
- 2.Re7#
- 1...fxe5
- 2.Re7#
- 1...Qg5
- 2.Re7#
- 1...Qh6
- 2.Re7#
- 1...Rb5
- 2.Sd4#
- 2.Re7#
- 1...Bg7
- 2.Sf7#
- 1...Qxg4!
- threat
- 1.Rd6+?
- 1...cxd6
- 2.Sd7#
- 1...Kxd6!
- 1...cxd6
- 1.Rdd7?
- threat
- 2.Sd4#
- 2.Sd8#
- 1...Qxg4
- 2.Sd8#
- 1...Rxc4
- 2.Sxc4#
- 2.Sd8#
- 1...Bxc6
- 2.Sxc6#
- 1...Rb8+!
- threat
- 1.Qe4?
- threat
- 2.Qd5#
- 1...Bxc6+
- 2.Sxc6#
- 1...Rb5
- 2.Sd4#
- 1...Sb6!
- threat
- 1.d4?
- threat
- 2.Sd3#
- 2.d5#
- 1...Bxc6+
- 2.Sxc6#
- 1...Qxg4
- 2.d5#
- 1...Qxh4
- 2.d5#
- 1...fxe5
- 2.d5#
- 1...Qg5
- 2.d5#
- 1...Qh6
- 2.d5#
- 1...Sb6
- 2.Sd3#
- 1...Rb5!
- threat
- 1.Rfd7?
- Keys
- 1.g7!
- threat
- 2.Sg6#
- 1...Qxf7+
- 2.Sxf7#
- 1...Bxc6+
- 2.Sxc6#
- 1...Qxg4
- 2.Rxf6#
- 1...Qxh4
- 2.Re7#
- 1...Rxc4
- 2.Sxc4#
- 1...fxe5
- 2.Qxe5#
- 1...Qg6
- 2.Sxg6#
- 1...Qg5
- 2.Re7#
- 1...Qh6
- 2.Re7#
- 1...Rb5
- 2.Sd4#
- threat
- 1.g7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- Q(e);P_PINR(J),XP(I)::QAR(A)+S(G),XQ(e)
- R(c);XP(D)::QAR(A)+S(G),XR(c)
- R(c);N_PINS(H)::S(H)
- R(i);N_GUARD::R1(J)
- R(i);XR(J)::QAR(A)+S(G),XR(i)
- R(i);S_CUTB(k)::R1(J),XP(g)
- B(b);CHECK,XS(H)::QAR(A)+S(G),XB(b)
- B(k);S_CUTR(i)::R1(J)
- Tries
- Try
- R(J);N_SPINS(H),P_SPINP(I)
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,N_GUARD::R1(J),XR(i)
- Q(e);N_PINP(I),XB(F)::S(H)
- R(c);XP(D)::QAR(A)+S(G),XR(c)
- R(i);XR(J)::QAR(A)+S(G)
- B(b);P_PINR(J),XS(H)::QAR(A)+S(G),XB(b)
- P(g);P_SPINP(g),XS(G)::S(H)
- Q(e);N_PINP(I)::S(H)
- R(c);::S(H)
- Refutation
- Q(e);N_PINP(I),N_SPINS(d),XB(E)
- Try
- R(J);P_SPINP(I),XR(i)
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,XS(H)::QAR(A)+S(G),XB(b)
- Q(e);N_PINP(I),XB(F)::R1(J)
- Q(e);N_PINP(I),XR(J)::QAR(A)+S(G)
- P(g);P_SPINP(g),XS(G)::R1(J)
- Q(e);N_PINP(I)::R1(J)
- B(k);::QAR(A)+S(G)
- Refutation
- Q(e);N_PINP(I),N_SPINS(d),XB(E)
- Try
- R(K);CHECK
- Vars
- P(h);SBLOCK,XR(K)::QAR(A)+S(G)
- Refutation
- K(f);N_SPINS(d),P-FLIGHT,XR(K)
- Try
- R(K);N_SPINS(H)
- Threat
- DUALS(2)
- Vars
- Q(e);N_SPINS(d),XB(E)::S(H)
- B(b);P_PINR(K),XS(H)::QAR(A)+S(G),XB(b)
- Refutation
- R(c);CHECK
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- B(b);CHECK,XS(H)::QAR(A)+S(G),XB(b)
- R(c);N_PINS(H)::S(H)
- Refutation
- S(j);
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,XS(H)::QAR(A)+S(G),XB(b)
- Q(e);N_SPINS(d),XB(E)::P(B)
- Q(e);XB(F)::P(B)
- P(g);P_SPINP(g),XS(G)::P(B)
- Q(e);::P(B)
- S(j);::QAR(A)+S(G)
- Refutation
- R(c);N_PINS(H)
- Try
- Actual
- P(I);P_SPINR(J)
- Threat
- QAR(A)+S(G)
- Vars
- Q(e);CHECK,XR(J)::QAR(A)+S(G),XQ(e)
- B(b);CHECK,XS(H)::QAR(A)+S(G),XB(b)
- Q(e);N_PINR(J),N_SPINS(d),XB(E)::R1(J),XP(g)
- Q(e);N_PINR(J),XB(F)::R1(J)
- R(c);XP(D)::QAR(A)+S(G),XR(c)
- P(g);OGATE,P_SPINP(g),XS(G)::QAR1(A),XP(g)
- Q(e);::QAR(A)+S(G),XQ(e)
- Q(e);N_PINR(J)::R1(J)
- R(c);N_PINS(H)::S(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).