MESON Chess Problem Database
Problem Display
PID: 110634 (3Q2nn/2p5/2PN3b/2PPk1p1/KR1p2P1/Ppr1p2N/1B2P2p/7B w - - 0 1)
Ohquist, Johannes
Hamburger Frennd., 1932
#2
13 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Bxd4#
- 1...Rc2
- 2.Bxd4#
- 1...Rd3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Rxc5
- 2.Bxd4#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3
- 2.Bxc3#
- 1...cxd6
- 2.Qxd6#
- 1...Rc1
- Tries
- 1.Ka5?
- 1...cxd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...Rc1
- 2.Bxd4#
- 1...Rc2
- 2.Bxd4#
- 1...Rd3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3
- 2.Bxc3#
- 1...Rxc5+!
- 1...cxd6
- 1.Kb5?
- 1...cxd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...Rc1
- 2.Bxd4#
- 1...Rc2
- 2.Bxd4#
- 1...Rd3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3
- 2.Bxc3#
- 1...Rxc5+!
- 1...cxd6
- 1.Se8?
- threat
- 2.Qxc7#
- 1...Bf8
- 2.Qxg5#
- 1...Sf7!
- threat
- 1.Ba1?
- 1...Rxc5
- 2.Bxd4#
- 1...cxd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...Rd3
- 2.Sc4#
- 1...Rc1
- 2.Bxd4#
- 1...Rc2
- 2.Bxd4#
- 1...Rc4
- 2.Sxc4#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3
- 2.Bxc3#
- 1...b2!
- 1...Rxc5
- 1.Bxc3?
- threat
- 2.Sc4#
- 2.Bxd4#
- 1...cxd6
- 2.Bxd4#
- 2.Qxd6#
- 1...Se7
- 2.Bxd4#
- 2.Qxe7#
- 1...dxc3!
- threat
- 1.Rc4?
- 1...Rxc4+
- 2.Sxc4#
- 1...cxd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...Rc1
- 2.Bxd4#
- 1...Rc2
- 2.Bxd4#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3
- 2.Bxc3#
- 1...Rd3!
- 1...Rxc4+
- 1.Qd7?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Rxc5
- 2.Bxd4#
- 2.Qe6#
- 1...Se7
- 2.Qe6#
- 2.Qxe7#
- 1...Kf6!
- threat
- 1.Qc8?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Rxc5
- 2.Qe6#
- 1...Se7
- 2.Qe6#
- 1...Kf6!
- threat
- 1.Qe8+?
- 1...Se7
- 2.Qxe7#
- 1...Kf6!
- 1...Se7
- 1.Ka5?
- Keys
- 1.Rxb3!
- 1...Rc4+
- 2.Sxc4#
- 1...Rxb3
- 2.Sc4#
- 1...Rxc5
- 2.Rxe3#
- 1...cxd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...d3
- 2.Bxc3#
- 1...Rd3
- 2.Sc4#
- 1...Rc1
- 2.Rxe3#
- 1...Rc2
- 2.Rxe3#
- 1...Bg7
- 2.Qxg5#
- 1...Bf8
- 2.Qxg5#
- 1...Sf6
- 2.Qe7#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Rc4+
- 1.Rxb3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);OGATE,P_SPINP(e)::B(B),XP(e)
- R(c);N_GUARD,P_SPINP(e)::S(L)
- R(c);N_GUARD,P_PINR(G),P_SPINP(e)::S(L),XR(c)
- R(c);OGATE,P_SPINP(e),XP(I)::B(B),XP(e)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(j);N_GUARD::QAR2(M),XS(j)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(k)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- S(j);N_GUARD::QAR2(M),XS(j)
- R(c);OGATE,P_SPINP(e)::B(B),XP(e)
- R(c);N_GUARD,P_SPINP(e)::S(L)
- R(c);N_GUARD,P_SPINP(e)::S(L),XR(c)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(k)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- Refutation
- R(c);CHECK,P_SPINP(e),XP(I)
- Try
- K(F);S_FLIGHT
- Vars
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- S(j);N_GUARD::QAR2(M),XS(j)
- R(c);OGATE,P_SPINP(e)::B(B),XP(e)
- R(c);N_GUARD,P_SPINP(e)::S(L)
- R(c);N_GUARD,P_SPINP(e)::S(L),XR(c)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(k)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- Refutation
- R(c);CHECK,P_SPINP(e),XP(I)
- Try
- S(L);
- Threat
- QAB(M),XP(i)
- Vars
- B(h);N_GUARD::QAR2(M),XP(g)
- Refutation
- S(k);
- Try
- B(B);
- Vars
- R(c);OGATE,P_SPINP(e),XP(I)::B(B),XP(e)
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- S(j);N_GUARD::QAR2(M),XS(j)
- R(c);N_GUARD,P_SPINP(e)::S(L)
- R(c);OGATE,P_SPINP(e)::B(B),XP(e)
- R(c);N_GUARD,P_PINR(G),P_SPINP(e)::S(L),XR(c)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(k)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- Refutation
- P(b);
- Try
- B(B);P_PINP(e),XR(c)
- Threat
- DUALS(2)
- Refutation
- P(e);N_SPINP(e),XB(B)
- Try
- R(G);
- Vars
- R(c);CHECK,P_SPINP(e),XR(G)::S(L),XR(c)
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- S(j);N_GUARD::QAR2(M),XS(j)
- R(c);OGATE,P_SPINP(e)::B(B),XP(e)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(k)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- Refutation
- R(c);P_SPINP(e)
- Try
- Q(M);
- Threat
- DUALS(2)
- Refutation
- K(f);S_FLIGHT
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- R(c);P_SPINP(e),XP(I)::QAR1(M)
- S(j);::QAR1(M)
- Refutation
- K(f);S_FLIGHT
- Try
- Q(M);CHECK
- Vars
- S(j);N_GUARD,P_SPINS(j)::QAR2(M),XS(j)
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- R(G);XP(b)
- Vars
- R(c);CHECK,N_GUARD,P_SPINP(e)::S(L),XR(c)
- R(c);N_GUARD,P_SPINP(e),XR(G)::S(L)
- R(c);OGATE,P_SPINP(e),XP(I)::R(G),XP(d)
- P(i);OGATE,XS(L)::QAB1(M),XP(i)
- S(j);N_GUARD::QAR2(M),XS(j)
- P(e);OGATEB,P_SPINR(c)::B(B),XR(c)
- R(c);N_GUARD,P_SPINP(e)::S(L)
- R(c);OGATE,P_SPINP(e)::R(G),XP(d)
- B(h);N_GUARD::QAR2(M),XP(g)
- S(j);N_GUARD::QAR2(M)
- S(k);N_GUARD::S(L)
- S(k);N_GUARD::S(L),XS(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).