MESON Chess Problem Database

Problem Display
PID: 90426 (8/2p5/p1P5/p1Q5/P3p3/2N1Kp2/1k2nR2/N7 w - - 0 1)

von Szugyi, Jul

Die Schwalbe, 1929

8/2p5/p1P5/p1Q5/P3p3/2N1Kp2/1k2nR2/N7

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa1
      • 2.Qa3#
    • 1...Kc1
      • 2.Qa3#
  • Tries
    • 1.Kxe4?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kc1!
    • 1.Rxe2+?
      • 1...Kxa1
        • 2.Ra2#
        • 2.Qa3#
      • 1...Kc1
        • 2.Sb3#
        • 2.Rc2#
        • 2.Qa3#
      • 1...fxe2!
    • 1.Rh2?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kc1
        • 2.Qa3#
      • 1...f2!
    • 1.Qb4+?
      • 1...Kxa1
        • 2.Qa3#
        • 2.Qb1#
      • 1...Kc1
        • 2.Rf1#
        • 2.Qa3#
        • 2.Qb1#
      • 1...axb4!
    • 1.Qb6+?
      • 1...Kxa1
        • 2.Qb1#
      • 1...Kc1
        • 2.Rf1#
        • 2.Qb1#
      • 1...Ka3
        • 2.Sc2#
        • 2.Qb3#
      • 1...Kxc3
        • 2.Qb3#
      • 1...cxb6!
    • 1.Qe7?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kc1
        • 2.Qa3#
      • 1...Kxc3!
    • 1.Qf8?
      • 1...Kxa1
        • 2.Qa3#
      • 1...Kc1
        • 2.Qa3#
      • 1...Kxc3!
    • 1.Qc4?
      • 1...Kxa1
        • 2.Qa2#
      • 1...Ka3
        • 2.Qb3#
      • 1...Kc1!
    • 1.Qb5+?
      • 1...Kxa1
        • 2.Qb1#
      • 1...Kc1
        • 2.Rf1#
        • 2.Qb1#
      • 1...Ka3
        • 2.Sc2#
        • 2.Qb3#
      • 1...Kxc3
        • 2.Qb3#
      • 1...axb5!
  • Keys
    • 1.Qd5!
      • 1...Kxa1
        • 2.Qa2#
      • 1...Kc1
        • 2.Qd2#
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxc3
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR2(F)
    • K(a);N_SPINS(b),S_FLIGHT::QAB(F)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(d)
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR2(F)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • R(B);CHECK,XS(b)
      • Refutation
        • P(c);XR(B)
    • Try
      • R(B);
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR2(F)
        • K(a);N_SPINS(b),S_FLIGHT::QAB(F)
      • Refutation
        • P(c);N_SPINS(b)
    • Try
      • Q(F);CHECK
      • Refutation
        • P(e);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT,XS(A)::QAR1(F)
        • K(a);N_SPINS(b),S_FLIGHT,XS(C)::QAR1(F)
      • Refutation
        • P(g);XQ(F)
    • Try
      • Q(F);
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR2(F)
        • K(a);N_SPINS(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR2(F)
        • K(a);N_SPINS(b),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR1(F)
        • K(a);N_SPINS(b),S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT,XS(A)::QAR1(F)
        • K(a);N_SPINS(b),S_FLIGHT,XS(C)::QAR1(F)
      • Refutation
        • P(f);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(a);N_SPINS(b),S_FLIGHT,XS(A)::QAR1(F)
      • K(a);N_SPINS(b),S_FLIGHT::QAB1(F)
      • K(a);N_SPINS(b),S_FLIGHT::QAR1(F)
      • K(a);N_SPINS(b),S_FLIGHT,XS(C)::QAR1(F)
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