MESON Chess Problem Database

Problem Display
PID: 266828 (b6q/r1pNP3/p1Pk2N1/K1Rr1P2/5P2/Q1pB4/6n1/3R4 w - - 0 1)

Wirtanen, Erkki Aukusti

Schackvarlden, 1934

b6q/r1pNP3/p1Pk2N1/K1Rr1P2/5P2/Q1pB4/6n1/3R4

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.e8S#
    • 1...Qf6
      • 2.e8S#
    • 1...Qg7
      • 2.e8S#
    • 1...Qh1
      • 2.e8S#
    • 1...Qh2
      • 2.e8S#
    • 1...Qh3
      • 2.e8S#
    • 1...Qh4
      • 2.e8S#
    • 1...Qh5
      • 2.e8S#
    • 1...Qh6
      • 2.e8S#
    • 1...Qh7
      • 2.e8S#
    • 1...Qf8
      • 2.exf8Q#
      • 2.exf8B#
    • 1...Rxc5+
      • 2.Qxc5#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Rdxd5#
        • 2.Rxc3#
        • 2.Rc4#
        • 2.Rcxd5#
      • 1...Rxd1
        • 2.Re5#
      • 1...Bxc6
        • 2.Rcxd5#
      • 1...Sxf4
        • 2.Rxc3#
        • 2.Rc4#
        • 2.Rcxd5#
      • 1...Qd4
        • 2.e8S#
      • 1...Qe5
        • 2.Rxc3#
        • 2.Rc4#
        • 2.Rcxd5#
        • 2.fxe5#
      • 1...Qg8
        • 2.Rxc3#
        • 2.Rc4#
        • 2.Rcxd5#
      • 1...Rd2
        • 2.Re5#
      • 1...Rd3
        • 2.Re5#
      • 1...Rd4
        • 2.Re5#
      • 1...Se3
        • 2.Rxc3#
        • 2.Rc4#
        • 2.Rcxd5#
      • 1...c2
        • 2.Rdxd5#
        • 2.Rxc2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Rcxd5#
      • 1...axb5+!
    • 1.Rb5+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Kxc6!
    • 1.Rxd5+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kxc6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se4#
      • 1...Rxc5+
        • 2.Bb5#
      • 1...Qxf6
        • 2.e8S#
      • 1...Rxf5
        • 2.Bxf5#
      • 1...Bxc6
        • 2.Rxd5#
      • 1...Rd4
        • 2.Rc4#
      • 1...Re5
        • 2.fxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(i);N_GUARD::P=S
    • Q(i);OGATE::PXQ(i)=Q
    • R(c);CHECK,OGATE,P_SPINR(c),XR(F)::QAB1(B),XR(c)
  • Tries
    • Try
      • B(C);N_SPINR(F),P_PINR(c)
      • Threat
        • DUALS(4)
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(A)::QAB(B)+R(F)
        • B(h);XP(H)::QAB(B)+R(F),DCHECK,XR(c)
        • Q(i);N_GUARD,N_SPINR(c)::P=S
        • R(c);OGATE::QAB(B)+R(F)
      • Refutation
        • P(d);CHECK,XB(C)
    • Try
      • R(F);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • R(F);CHECK,N_SPINR(F),XR(c)
      • Vars
        • K(e);P-FLIGHT,XR(F)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT,XP(H)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • R(c);CHECK,OGATEB,P_SPINR(c),XR(F)::R(A)+B(C)
      • Q(i);N_GUARD,XS(J)::P=S
      • R(c);OGATE,XP(G)::R(A)+B(C),XR(c)
      • B(h);SBLOCK,XP(H)::QAB(B)+R(F),DCHECK,XR(c)
      • R(c);N_PINR(F)::QAB(B)+R(F)
      • R(c);OGATE::P(D),XR(c)
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