MESON Chess Problem Database
Problem Display
PID: 260931 (8/p7/P5p1/1Q1PN1Rp/p2rk1pP/P2R2K1/8/8 w - - 0 1)
Hoffmann, Martin Wolfgang
Neue Zurcher Zeitung, 1969
#2
9 + 7
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxd3+
- 2.Qxd3#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rxd5
- 2.Qxd5#
- 1...Rxd3+
- Tries
- 1.Sf3?
- threat
- 2.Sd2#
- 2.Re5#
- 1...Rxd3
- 2.Re5#
- 2.Qe8#
- 1...Rxd5
- 2.Sd2#
- 2.Qxd5#
- 1...Rc4
- 2.Qxc4#
- 1...gxf3!
- threat
- 1.Sc6?
- threat
- 2.Re5#
- 1...Rxd5
- 2.Qxd5#
- 1...Rc4
- 2.Qxc4#
- 1...Rxd3+!
- threat
- 1.Sxg6?
- threat
- 2.Re5#
- 1...Rxd5
- 2.Qxd5#
- 1...Rc4
- 2.Qxc4#
- 1...Rxd3+!
- threat
- 1.Sd7?
- threat
- 2.Sc5#
- 2.Sf6#
- 2.Re5#
- 1...Rxd5
- 2.Sf6#
- 2.Qxd5#
- 1...Rc4
- 2.Qxc4#
- 1...Rxd3+!
- threat
- 1.Sf7?
- threat
- 2.Sd6#
- 2.Re5#
- 1...Rxd5
- 2.Qxd5#
- 1...Rc4
- 2.Qxc4#
- 1...Rxd3+!
- threat
- 1.Rxd4+?
- 1...Ke3
- 2.Qd3#
- 1...Kxd4!
- 1...Ke3
- 1.Qxa4?
- threat
- 2.Qxd4#
- 1...Kxd5
- 2.Qc6#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rxa4!
- threat
- 1.Qc6?
- 1...Rxd5
- 2.Qxd5#
- 2.Qxg6#
- 1...Rb4
- 2.Qxg6#
- 2.d6#
- 1...Rc4
- 2.Qxc4#
- 2.Qxg6#
- 1...Rxd3+!
- 1...Rxd5
- 1.Qb1?
- threat
- 2.Qh1#
- 1...Rxd3+
- 2.Qxd3#
- 1...Kxd5!
- threat
- 1.Qb3?
- threat
- 2.Re3#
- 1...Rxd3+
- 2.Qxd3#
- 1...Rxd5
- 2.Qxd5#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...axb3!
- threat
- 1.Qa5?
- 1...Rxd5
- 2.Qe1#
- 2.Qxd5#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qe1#
- 1...Rxd3+!
- 1...Rxd5
- 1.Qc5?
- threat
- 2.Qxd4#
- 1...Rxd5
- 2.Re3#
- 2.Qe3#
- 2.Qxd5#
- 1...Rb4
- 2.Re3#
- 2.Qe3#
- 2.Qxb4#
- 1...Rc4
- 2.Re3#
- 2.Qe3#
- 2.Qxc4#
- 1...Rxd3+!
- threat
- 1.d6?
- 1...Rxd3+
- 2.Qxd3#
- 1...Rc4
- 2.Qxc4#
- 2.Qd5#
- 1...Rb4
- 2.Qc6#
- 2.Qxb4#
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Rxd6!
- 1...Rxd3+
- 1.Sf3?
- Keys
- 1.Qe8!
- 1...Rxd3+
- 2.Sf3#
- 1...Kxd5
- 2.Qc6#
- 1...Rxd5
- 2.Qxg6#
- 1...Rb4
- 2.Qxg6#
- 1...Rc4
- 2.Qxg6#
- 1...Rxd3+
- 1.Qe8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(b);CHECK,OGATE,XR(B)::QAB1(E),XR(b)
- R(b);OGATEB::QAR(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- R(b);OGATE,XP(F)::QAB1(E),XR(b)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- P(d);XS(G)
- Try
- S(G);
- Threat
- R1(H)
- Vars
- R(b);OGATE,XP(F)::QAB1(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- R(b);CHECK,XR(B)
- Try
- S(G);XP(f)
- Threat
- R1(H)
- Vars
- R(b);OGATE,XP(F)::QAB1(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- R(b);CHECK,XR(B)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- R(b);CHECK,XR(B)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(b);OGATE,XP(F)::QAB1(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- R(b);CHECK,XR(B)
- Try
- R(B);CHECK,XR(b)
- Vars
- K(c);P-FLIGHT::QAR1(E)
- Refutation
- K(c);P-FLIGHT,XR(B)
- Try
- Q(E);P_PINR(b),XP(a)
- Threat
- QAR1(E),XR(b)
- Vars
- K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(E)
- R(b);OGATEB::QAR(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- R(b);N_SPINR(b),XQ(E)
- Try
- Q(E);
- Refutation
- R(b);CHECK,XR(B)
- Try
- Q(E);
- Threat
- QAB(E)
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XR(B)::QAB1(E),XR(b)
- Refutation
- K(c);P_SPINR(b),S_FLIGHT,XP(F)
- Try
- Q(E);
- Threat
- R1(B)
- Vars
- R(b);CHECK,OGATE,XR(B)::QAB1(E),XR(b)
- R(b);OGATE,XP(F)::QAB1(E),XR(b)
- R(b);OGATEB::QAR(E),XR(b)
- R(b);OGATEB::QAR2(E),XR(b)
- Refutation
- P(a);XQ(E)
- Try
- Q(E);
- Vars
- R(b);OGATEB::QAR(E),XR(b)
- R(b);::QAR(E)
- Refutation
- R(b);CHECK,XR(B)
- Try
- Q(E);
- Threat
- QAR1(E),XR(b)
- Refutation
- R(b);CHECK,XR(B)
- Try
- P(F);
- Vars
- R(b);CHECK,OGATE,XR(B)::QAB1(E),XR(b)
- R(b);N_GUARD::QAB1(E),XR(b)
- Refutation
- R(b);XP(F)
- Try
- Actual
- Q(E);
- Vars
- R(b);CHECK,SBLOCK,XR(B)::QAR(E)+S(G)
- K(c);OGATEB,P_SPINR(b),S_FLIGHT,XP(F)::QAB1(E)
- R(b);XP(F)::QAB(E),XP(f)
- R(b);::QAB(E),XP(f)
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