MESON Chess Problem Database
Problem Display
PID: 260781 (8/3np3/4B3/8/R2rk2N/2RNp1BK/7P/Q1n5 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1942
#2
9 + 6
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxa4
- 2.Qxa4#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Raxc4#
- 1...Sa2
- 2.Qh1#
- 1...Se2
- 2.Qh1#
- 1...Sb3
- 2.Qh1#
- 1...Sxd3
- 2.Qh1#
- 1...Sc5
- 2.Sxc5#
- 1...Se5
- 2.Sc5#
- 1...Sb6
- 2.Sc5#
- 1...Sf6
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sf8
- 2.Sc5#
- 1...e2
- 2.Sf2#
- 1...Rxa4
- Tries
- 1.Bc7?
- 1...Rxa4
- 2.Qxa4#
- 1...Sxd3
- 2.Qh1#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Raxc4#
- 1...e2
- 2.Sf2#
- 1...Sc5
- 2.Sxc5#
- 1...Sa2
- 2.Qh1#
- 1...Se2
- 2.Qh1#
- 1...Sb3
- 2.Qh1#
- 1...Sb6
- 2.Sc5#
- 1...Sf6
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sf8
- 2.Sc5#
- 1...Se5!
- 1...Rxa4
- 1.Rb3?
- threat
- 2.Rxd4#
- 2.Qxd4#
- 1...Rxa4
- 2.Qxa4#
- 1...e2
- 2.Sf2#
- 2.Qxd4#
- 1...Rb4
- 2.Raxb4#
- 1...Rc4
- 2.Rxc4#
- 1...Se2
- 2.Qh1#
- 1...Sxb3!
- threat
- 1.Rc5?
- threat
- 2.Bf5#
- 2.Rxd4#
- 2.Qxd4#
- 1...Rxa4
- 2.Bf5#
- 1...Sxc5
- 2.Sxc5#
- 2.Rxd4#
- 2.Qxd4#
- 1...e2
- 2.Qxd4#
- 1...Rb4
- 2.Bf5#
- 1...Rc4
- 2.Bf5#
- 1...Se2
- 2.Bf5#
- 1...Sb3
- 2.Bf5#
- 1...Kxd3!
- threat
- 1.Rb4?
- threat
- 2.Qa8#
- 1...Rc4
- 2.Rbxc4#
- 1...e2
- 2.Sf2#
- 1...Sc5
- 2.Sxc5#
- 1...Sa2
- 2.Qh1#
- 1...Se5
- 2.Sc5#
- 1...Sb6
- 2.Sc5#
- 1...Sf6
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Rxb4!
- threat
- 1.Rac4?
- threat
- 2.Qa8#
- 1...e2
- 2.Sf2#
- 1...Sc5
- 2.Sxc5#
- 1...Sa2
- 2.Qh1#
- 1...Se5
- 2.Sc5#
- 1...Sb6
- 2.Sc5#
- 1...Sf6
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Rxc4!
- threat
- 1.Qb2?
- threat
- 2.Qg2#
- 2.Qb7#
- 1...Rb4
- 2.Rxb4#
- 2.Qxb4#
- 1...Rc4
- 2.Raxc4#
- 1...e2
- 2.Sf2#
- 1...Sc5
- 2.Sxc5#
- 2.Qg2#
- 1...Se2
- 2.Qb7#
- 1...Sb3
- 2.Qg2#
- 1...Se5
- 2.Sc5#
- 1...Sb6
- 2.Sc5#
- 2.Qg2#
- 1...Sf6
- 2.Sc5#
- 2.Qg2#
- 1...Sb8
- 2.Sc5#
- 2.Qg2#
- 1...Rxa4!
- threat
- 1.Qb1?
- threat
- 2.Sxc1#
- 2.Sf2#
- 2.Sc5#
- 2.Qb7#
- 1...Sxd3
- 2.Qxd3#
- 2.Qh1#
- 2.Qb7#
- 1...Rb4
- 2.Rxb4#
- 2.Qxb4#
- 1...Rc4
- 2.Rcxc4#
- 2.Raxc4#
- 1...e2
- 2.Sxc1#
- 2.Sf2#
- 2.Sc5#
- 1...Sc5
- 2.Sf2#
- 2.Sxc5#
- 1...Sa2
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sf2#
- 2.Sc5#
- 2.Se5#
- 2.Qh1#
- 2.Qb7#
- 1...Se2
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sf2#
- 2.Sc5#
- 2.Se5#
- 2.Qh1#
- 2.Qb7#
- 1...Sb3
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sf2#
- 2.Sc5#
- 2.Se5#
- 2.Qh1#
- 1...Se5
- 2.Sf2#
- 2.Sc5#
- 1...Sb6
- 2.Sxc1#
- 2.Sf2#
- 2.Sc5#
- 1...Sf6
- 2.Sxc1#
- 2.Sf2#
- 2.Sc5#
- 1...Sb8
- 2.Sxc1#
- 2.Sf2#
- 2.Sc5#
- 1...Rxa4!
- threat
- 1.Qxc1?
- threat
- 2.Qh1#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Raxc4#
- 1...Se5
- 2.Sc5#
- 1...e2
- 2.Sf2#
- 2.Qf4#
- 1...Rxa4!
- threat
- 1.Qa2?
- threat
- 2.Bd5#
- 2.Bf5#
- 2.Qd5#
- 2.Qg2#
- 1...Rxa4
- 2.Qd5#
- 2.Qxa4#
- 1...Rb4
- 2.Rxb4#
- 2.Qd5#
- 1...Rc4
- 2.Raxc4#
- 2.Qxc4#
- 1...e2
- 2.Sf2#
- 1...Se2
- 2.Bd5#
- 2.Bf5#
- 2.Qd5#
- 1...Sb3
- 2.Qg2#
- 1...Se5
- 2.Sc5#
- 2.Bd5#
- 2.Bf5#
- 2.Qd5#
- 1...Sb6
- 2.Sc5#
- 2.Bf5#
- 2.Qg2#
- 1...Sf6
- 2.Sc5#
- 2.Bf5#
- 2.Qg2#
- 1...Sxa2!
- threat
- 1.Bc7?
- Keys
- 1.Sb4!
- threat
- 2.Bf5#
- 1...Rxb4
- 2.Rxb4#
- 1...Rd1
- 2.Sd3#
- 1...Rd2
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Rc4
- 2.Rxc4#
- 1...Rd5
- 2.Sxd5#
- 1...Rd6
- 2.Sd5#
- threat
- 1.Sb4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 12
- Sets
- R(c);N_SPINR(c),OGATE,XR(G)::QAR(A),XR(c)
- R(c);OGATEB::R(G),XR(c)
- S(a);OGATE::QAB(A)
- S(a);OGATE,XS(D)::QAB(A)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- P(b);N_GUARD::S(D)
- Tries
- Try
- B(E);
- Vars
- R(c);N_SPINR(c),OGATE,XR(G)::QAR(A),XR(c)
- S(a);OGATE,XS(D)::QAB(A)
- R(c);OGATEB::R(G),XR(c)
- P(b);N_GUARD::S(D)
- S(e);N_GUARD::S(D),XS(e)
- S(a);OGATE::QAB(A)
- S(e);N_GUARD::S(D)
- Refutation
- S(e);
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINR(c),OGATE,XR(G)::QAR(A),XR(c)
- R(c);OGATEB::R(G),XR(c)
- S(a);OGATE::QAB(A)
- Refutation
- S(a);XR(C)
- Try
- R(C);
- Threat
- DUALS(3)
- Vars
- R(c);N_SPINR(c),XR(G)::B(I)
- P(b);::QAR1(A),XR(c)
- R(c);::B(I)
- S(a);::B(I)
- Refutation
- K(d);N_SPINR(c),S_FLIGHT,XS(D)
- Try
- R(G);
- Threat
- QAB(A)
- Vars
- R(c);OGATEB::R(G),XR(c)
- P(b);N_GUARD::S(D)
- S(e);N_GUARD::S(D),XS(e)
- S(a);OGATE::QAB(A)
- S(e);N_GUARD::S(D)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- R(G);
- Threat
- QAB(A)
- Vars
- P(b);N_GUARD::S(D)
- S(e);N_GUARD::S(D),XS(e)
- S(a);OGATE::QAB(A)
- S(e);N_GUARD::S(D)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(c);OGATEB::R(G),XR(c)
- P(b);N_GUARD::S(D)
- S(a);::QAB(A)
- S(e);N_GUARD::S(D)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- Q(A);
- Threat
- DUALS(4)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- Q(A);XS(a)
- Threat
- QAB(A)
- Vars
- R(c);OGATEB::R(G),XR(c)
- S(e);N_GUARD::S(D)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- P(b);N_GUARD::S(D)
- S(a);::QAB(A)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- S(D);N_PINR(c)
- Threat
- B(I)
- Vars
- R(c);OGATE,P_SPINR(c),XS(D)::R(G),XR(c)
- R(c);::R(G)+S(D)
- R(c);::R(G)+S(D),XR(c)
- R(c);OGATEB::R(C),XR(c)
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