MESON Chess Problem Database

Problem Display
PID: 231605 (8/7N/4p1P1/1P2k3/4B3/1Q1R4/1r2R3/BNK5 w - - 0 1)

Schiffert, Gyorgy

1st HM., Magyar Sakkvilag, 1927

8/7N/4p1P1/1P2k3/4B3/1Q1R4/1r2R3/BNK5

#2

10 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bf5+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Kxf5!
    • 1.Rf3?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kd6!
    • 1.Rh3?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6!
    • 1.Rd5+?
      • 1...Kf4
        • 2.Qf3#
      • 1...exd5!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qg5#
      • 1...exd5!
    • 1.Qxe6+?
      • 1...Kf4
        • 2.Rf3#
        • 2.Qf5#
      • 1...Kxe6!
  • Keys
    • 1.Rd4!
      • 1...Rxb1+
        • 2.Bxb1#
      • 1...Rc2+
        • 2.Bxc2#
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Bc2#
      • 1...Rxe2
        • 2.Qg3#
      • 1...Rxb3
        • 2.Bd3#
      • 1...Ra2
        • 2.Bc2#
        • 2.Qg3#
      • 1...Rd2
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::R1(F)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT,XB(G)
    • Try
      • R(F);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);N_SPINR(a),S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::QAR1(E)
      • Refutation
        • P(c);XR(F)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);N_SPINR(a),OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • P(c);XQ(E)
    • Try
      • Q(E);CHECK,XP(c)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT,XQ(E)
  • Actual
    • R(F);N_PINR(a)
    • Vars
      • R(a);CHECK,OGATE,XS(B)::R(D)+B(G),XR(a)
      • R(a);CHECK::R(D)+B(G),XR(a)
      • K(b);OGATEB,P_SPINR(a),S_FLIGHT,XR(F)::QAB1(E)
      • K(b);S_FLIGHT::R(F)+B(G)
      • R(a);XR(D)::QAB(E)
      • R(a);N_GUARD,XQ(E)::R(D)+B(G)
      • R(a);::QAB(E)
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